Pharmaceutical compositions for delivery of herpes simplex virus antigens and related methods

Abstract

The present disclosure provides pharmaceutical compositions for delivery of HSV antigens (e.g., an HSV vaccine) and related technologies (e.g., components thereof and / or methods relating thereto).

Description

Attorney Docket No.: 2013237-1142 (P1609WO01) PHARMACEUTICAL COMPOSITIONS FOR DELIVERY OF HERPES SIMPLEX VIRUS ANTIGENS AND RELATED METHODS RELATED APPLICATIONS

[0001] This application claims priority to and the benefit of U.S. Provisional Patent Application No. 63 / 517362, filed on August 3, 2023, and U.S. Provisional Patent Application No. 63 / 639547, filed on April 26, 2024, the entire contents of which are hereby incorporated by reference in their entirety. SEQUENCE LISTING

[0002] The present specification makes reference to a Sequence Listing (submitted electronically as a .xml file named “2013237-1142_ST26.xml” on August 2, 2024). The .xml file was generated on July 31, 2024, and is 613,105 bytes in size. The entire contents of the Sequence Listing are herein incorporated by reference. BACKGROUND

[0003] Herpes simplex viruses (HSV), commonly referred to only as herpes, are categorized into two types: herpes simplex virus, type 1 (HSV-1, or oral herpes) and herpes simplex virus, type 2 (HSV-2, or genital herpes). According to the World Health Organization, an estimated 3.7 billion people under age 50 (67% of global population) have HSV-1 infection globally. HSV-1 prevalence is understood as being highest in Africa and lowest in the Americas. An estimated 491 million people aged 15-49 (13% of global population) worldwide have HSV-2 infection. More women are infected with HSV-2 than men, because sexual transmission of HSV is more efficient from men to women than from women to men. Prevalence of HSV-2 infection was estimated to be highest in Africa, followed by the Americas. Prevalence of HSV-2 was also shown to increase with age, though the highest numbers of people newly infected have historically been in adolescents. Both HSV-1 and HSV-2 infections are lifelong. SUMMARY

[0004] The present disclosure provides pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) for delivering particular herpes simplex virus (HSV) antigen constructs (e.g., HSV-1 antigen constructs, HSV-2 antigen constructs, or a combination thereof) to a subject (e.g., a patient) and related technologies (e.g., methods). In particular, the present disclosure provides HSV (e.g., HSV-1, HSV-2, or both) compositions (e.g., vaccines) and related technologies (e.g., methods). The present disclosure includes the unexpected discovery that HSV antigens provided in Tables 3-5 below, and antigenic fragments thereof, are particularly advantageous for use in preventing or treating HSV, e.g., in HSV antigen constructs and / or HSV compositions (e.g., vaccines) as further disclosed herein.

[0005] The present disclosure provides, for example, polyribonucleotides that encodes one or more HSV antigens (e.g., an HSV-1 antigen, an HSV-2 antigen, or a combination thereof) or antigenic fragments thereof. In some embodiments, such a polyribonucleotide can be part of an RNA construct. In some embodiments, a polyribonucleotide or RNA construct as provided herein can be part of a composition (e.g., a pharmaceutical composition, e.g., an immunogenic composition, e.g., a vaccine. Page 1 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0006] The present disclosure provides a polyribonucleotide encoding a polypeptide. In some embodiments, a polypeptide comprises one or more herpes simplex virus (HSV) antigens or antigenic fragments thereof.

[0007] In some embodiments, one or more HSV antigens or antigenic fragments thereof comprise: (i) HSV-1 antigens or antigenic fragments thereof, (ii) HSV-2 antigens or antigenic fragments thereof, or (iii) a combination thereof.

[0008] In some embodiments, a polypeptide comprises a single HSV antigen or antigenic fragment thereof. In some embodiments, a polypeptide comprises a single HSV antigen. In some embodiments, a polypeptide comprises a single HSV antigenic fragment.

[0009] In some embodiments, the polypeptide comprises two or more HSV antigens or antigenic fragments thereof. In some embodiments, a polypeptide comprises two or more HSV antigens. In some embodiments, a polypeptide comprises two or more HSV antigenic fragments, wherein the two or more HSV antigenic fragments are each a fragment of a different HSV antigen. In some embodiments, a polypeptide comprises two or more HSV antigenic fragments, wherein at least two of the HSV antigenic fragments are a fragment from the same HSV antigen. In some embodiments, a polypeptide comprises three or more HSV antigens or antigenic fragments thereof. In some embodiments, a polypeptide comprises four or more HSV antigens or antigenic fragments thereof.

[0010] In some embodiments, a polypeptide does not comprise a full-length HSV antigen.

[0011] In some embodiments, one or more HSV antigens or antigenic fragments thereof comprise one or more T cell antigens or antigenic fragments thereof. In some embodiments, one or more HSV antigens or antigenic fragments thereof comprise one or more B cell antigens or antigenic fragments thereof.

[0012] In some embodiments, one or more HSV antigens or antigenic fragments thereof have at least 80% sequence identity, such as at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identity with one or more sequences selected from SEQ ID NOs: 1-74 and 260- 270 or an antigenic fragment thereof. In some embodiments, a polypeptide comprises one or more HSV-2 antigens or antigenic fragments thereof comprising or consisting of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to amino acid sequence selected from SEQ ID NO: 174-196 and 224-233.

[0013] In some embodiments, one or more HSV antigens or antigenic fragments thereof comprise: (i) one or more HSV RS1 polypeptides or antigenic fragments thereof, (ii) one or more HSV RL2 polypeptides or antigenic fragments thereof, (iii) one or more HSV UL1 polypeptides or antigenic fragments thereof, (iv) one or more HSV UL5 polypeptides or antigenic fragments thereof, (v) one or more HSV UL9 polypeptides or antigenic fragments thereof, (vi) one or more HSV UL19 polypeptides or antigenic fragments thereof, (vii) one or more HSV UL21 polypeptides or antigenic fragments thereof, (viii) one or more HSV UL25 polypeptides or antigenic fragments thereof, (ix) one or more HSV UL27 polypeptides or antigenic fragments thereof, (x) one or more HSV UL29 polypeptides or antigenic fragments thereof, (xi) one or more HSV UL30 polypeptides or antigenic fragments thereof, (xii) one or more HSV UL39 polypeptides or antigenic fragments thereof, (xiii) one or more HSV UL40 polypeptides or antigenic fragments Page 2 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) thereof, (xiv) one or more HSV UL46 polypeptides or antigenic fragments thereof, (xv) one or more HSV UL47 polypeptides or antigenic fragments thereof, (xvi) one or more HSV UL48 polypeptides or antigenic fragments thereof, (xvii) one or more HSV UL49 polypeptides or antigenic fragments thereof, (xviii) one or more HSV UL52 polypeptides or antigenic fragments thereof, (xix) one or more HSV UL54 polypeptides or antigenic fragments thereof, (xx) one or more HSV US10 polypeptides or antigenic fragments thereof, (xxi) one or more HSV US12 polypeptides or antigenic fragments thereof, (xxii) one or more HSV UL26 polypeptides or antigenic fragments thereof, (xxiii) one or more HSV UL50 polypeptides or antigenic fragments thereof, or (xxiv) a combination thereof. In some embodiments, a polypeptide comprises one or more HSV antigenic fragments, and the one or more HSV antigenic fragments comprise: (i) one or more HSV RS1 polypeptide antigenic fragments, (ii) one or more HSV RL2 polypeptide antigenic fragments, (iii) one or more HSV UL1 polypeptide antigenic fragments, (iv) one or more HSV UL5 polypeptide antigenic fragments, (v) one or more HSV UL9 polypeptide antigenic fragments,(vi) one or more HSV UL19 polypeptide antigenic fragments, (vii) one or more HSV UL21 polypeptide antigenic fragments, (viii) one or more HSV UL25 polypeptide antigenic fragments,(ix) one or more HSV UL27 polypeptide antigenic fragments, (x) one or more HSV UL29 polypeptide antigenic fragments, (xi) one or more HSV UL30 polypeptide antigenic fragments,(xii) one or more HSV UL39 polypeptide antigenic fragments, (xiii) one or more HSV UL40 polypeptide antigenic fragments, (xiv) one or more HSV UL46 polypeptide antigenic fragments, (xv) one or more HSV UL47 polypeptide antigenic fragments, (xvi) one or more HSV UL48 polypeptide antigenic fragments, (xvii) one or more HSV UL49 polypeptide antigenic fragments, (xviii) one or more HSV UL52 polypeptide antigenic fragments,(xix) one or more HSV UL54 polypeptide antigenic fragments, (xx) one or more HSV US10 polypeptide antigenic fragments, (xxi) one or more HSV US12 polypeptide antigenic fragments, (xxii) one or more HSV UL26 polypeptide antigenic fragments, (xxiii) one or more HSV UL50 polypeptide antigenic fragments, or (xxiv) a combination thereof.

[0014] In some embodiments, a polypeptide comprises one or more HSV RL2 polypeptides or antigenic fragments thereof, one or more HSV RS1 polypeptides or antigenic fragments thereof, and one or more HSV UL54 polypeptides or antigenic fragments thereof. In some embodiments, a polypeptide comprises an HSV-1 gD secretory signal, one or more RL2 polypeptides or antigenic fragments thereof, one or more RS1 polypeptides or antigenic fragments thereof, one or more UL54 polypeptides or antigenic fragments thereof, and a MITD.

[0015] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-1 gD secretory signal, an RL2 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, an RS1 polypeptide or antigenic fragment thereof, a linker, a UL54 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to amino acid sequence SEQ ID NO: 197.

[0016] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-1 gD secretory signal, an UL54 polypeptide or antigenic fragment thereof, a linker, an RS1 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, a RL2 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, Page 3 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) at least 97%, at least 98%, at least 99%, or 100% identical to the amino acid sequence according to SEQ ID NO: 201.

[0017] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-2 gD secretory signal, an RL2 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, an RS1 polypeptide or antigenic fragment thereof, a linker, a UL54 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to an amino acid sequence according to SEQ ID NO: 205.

[0018] In some embodiments, a polypeptide comprises one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL49 polypeptides or antigenic fragments thereof, and one or more HSV UL9 polypeptides or antigenic fragments thereof. In some embodiments, a polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL49 polypeptides or antigenic fragments thereof, one or more HSV UL9 polypeptides or antigenic fragments thereof, and a MITD.

[0019] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-1 gD secretory signal, an UL29 polypeptide or antigenic fragment thereof, a linker, an UL39 polypeptide or antigenic fragment thereof, a linker, an UL49 polypeptide or antigenic fragment thereof, a linker, a UL9 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to an amino acid sequence according to SEQ ID NO: 198.

[0020] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-1 gD secretory signal, an UL9 polypeptide or antigenic fragment thereof, a linker, an UL49 polypeptide or antigenic fragment thereof, a linker, an UL39 polypeptide or antigenic fragment thereof, a linker, a UL29 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to an amino acid sequence according to SEQ ID NO: 202.

[0021] In some embodiments, a polypeptide comprises one or more HSV UL30 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, and one or more HSV UL52 polypeptides or antigenic fragments thereof. In some embodiments, a polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL30 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, one or more HSV UL52 polypeptides or antigenic fragments thereof, and a MITD. Page 4 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0022] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-1 gD secretory signal, an UL30 polypeptide or antigenic fragment thereof, a linker, an UL30 polypeptide or antigenic fragment thereof, a linker, an UL40 polypeptide or antigenic fragment thereof, a linker, a UL5 polypeptide or antigenic fragment thereof, a linker, a UL5 polypeptide or antigenic fragment thereof, a linker, a UL52 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to an amino acid sequence according to SEQ ID NO: 199.

[0023] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-1 gD secretory signal, an UL52 polypeptide or antigenic fragment thereof, a linker, an UL5 polypeptide or antigenic fragment thereof, a linker, an UL5 polypeptide or antigenic fragment thereof, a linker, a UL40 polypeptide or antigenic fragment thereof, a linker, a UL30 polypeptide or antigenic fragment thereof, a linker, a UL30 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to an amino acid sequence according to SEQ ID NO: 203.

[0024] In some embodiments, a polypeptide comprises one or more HSV UL1 polypeptides or antigenic fragments thereof, one or more HSV UL19 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, one or more HSV UL27 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more UL48 polypeptides or antigenic fragments thereof, and one or more HSV UL25 polypeptides or antigenic fragments thereof. In some embodiments, a polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL1 polypeptides or antigenic fragments thereof, one or more HSV UL19 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, one or more HSV UL27 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more UL48 polypeptides or antigenic fragments thereof, one or more HSV UL25 polypeptides or antigenic fragments thereof, and a MITD.

[0025] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-1 gD secretory signal, an HSV UL1 polypeptide or antigenic fragment thereof, a linker, an HSV UL19 polypeptide or antigenic fragment thereof, a linker, an HSV UL21 polypeptide or antigenic fragment thereof, a linker, an HSV UL27 polypeptide or antigenic fragment thereof, a linker, an HSV UL27 polypeptide or antigenic fragment thereof, a linker, an HSV UL46 polypeptide or antigenic fragment thereof, a linker, an HSV UL47 polypeptide or antigenic fragment thereof, a linker, an HSV UL25 polypeptide or antigenic fragment thereof, a linker, an HSV UL48 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to an amino acid sequence according to SEQ ID NO: 200. Page 5 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0026] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, nucleotide sequences that encode an HSV-1 gD secretory signal, an HSV UL48 polypeptide or antigenic fragment thereof, a linker, an HSV UL25 polypeptide or antigenic fragment thereof, a linker, an HSV UL47 polypeptide or antigenic fragment thereof, a linker, an HSV UL46 polypeptide or antigenic fragment thereof, a linker, an HSV UL27 polypeptide or antigenic fragment thereof, a linker, an HSV UL27 polypeptide or antigenic fragment thereof, a linker, an HSV UL21 polypeptide or antigenic fragment thereof, a linker, an HSV UL19 polypeptide or antigenic fragment thereof, a linker, an HSV UL1 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to an amino acid sequence according to SEQ ID NO: 204.

[0027] In some embodiments, a polypeptide comprises one or more HSV US1 polypeptides or antigenic fragments thereof, one or more HSV US8 polypeptides or antigenic fragments thereof, one or more HSV US12 polypeptides or antigenic fragments thereof, one or more HSV UL50 polypeptides or antigenic fragments thereof, one or more HSV UL26 polypeptides or antigenic fragments thereof, and one or more HSV US10 polypeptides or antigenic fragments thereof.

[0028] In some embodiments, a polypeptide comprises an HSV-1 gD secretory signal, one or more HSV US1 polypeptides or antigenic fragments thereof, one or more HSV US8 polypeptides or antigenic fragments thereof, one or more HSV US12 polypeptides or antigenic fragments thereof, one or more HSV UL50 polypeptides or antigenic fragments thereof, one or more HSV UL26 polypeptides or antigenic fragments thereof, and one or more HSV US10 polypeptides or antigenic fragments thereof, and a MITD.

[0029] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, an US1 polypeptide or antigenic fragment thereof, a linker, an US1 polypeptide or antigenic fragment thereof, a linker, an US8 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US12 polypeptide or antigenic fragment thereof, a linker, a UL50 polypeptide or antigenic fragment thereof, a linker, a UL26 polypeptide or antigenic fragment thereof, a linker, a UL26 polypeptide or antigenic fragment thereof, a linker, a US10 polypeptide or antigenic fragment thereof, and a linker.

[0030] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an US1 polypeptide or antigenic fragment thereof, a linker, an US1 polypeptide or antigenic fragment thereof, a linker, an US8 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US12 polypeptide or antigenic fragment thereof, a linker, a UL50 polypeptide or antigenic fragment thereof, a linker, a UL26 polypeptide or antigenic fragment thereof, a linker, a UL26 polypeptide or antigenic fragment thereof, a linker, a US10 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence according to SEQ ID NO: 234. In some embodiments, a polyribonucleotide comprises or consists of an amino acid sequence according to SEQ ID NO: 256.

[0031] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, an UL26 polypeptide or antigenic fragment thereof, a linker, an UL26 polypeptide or antigenic fragment thereof, a linker, an Page 6 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) US10 polypeptide or antigenic fragment thereof, a linker, a UL50 polypeptide or antigenic fragment thereof, a linker, a US12 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US1 polypeptide or antigenic fragment thereof, a linker, a US1 polypeptide or antigenic fragment thereof, and a linker.

[0032] In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an UL26 polypeptide or antigenic fragment thereof, a linker, an UL26 polypeptide or antigenic fragment thereof, a linker, an US10 polypeptide or antigenic fragment thereof, a linker, a UL50 polypeptide or antigenic fragment thereof, a linker, a US12 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US8 polypeptide or antigenic fragment thereof, a linker, a US1 polypeptide or antigenic fragment thereof, a linker, a US1 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a polypeptide comprises or consists of an amino acid sequence according to SEQ ID NO: 235. In some embodiments, polyribonucleotide comprises or consists of an amino acid sequence according to SEQ ID NO: 257.

[0033] In some embodiments, a polypeptide comprises an HSV-1 gD secretory signal, one or more RL2 polypeptides or antigenic fragments thereof, one or more RS1 polypeptides or antigenic fragments thereof, one or more UL54 polypeptides or antigenic fragments thereof, and an HSV-1 gD transmembrane region. In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an RL2 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, an RS1 polypeptide or antigenic fragment thereof, a linker, a UL54 polypeptide or antigenic fragment thereof, a linker, and an HSV-1 gD transmembrane region. In some embodiments, a polypeptide comprises or consists of an amino acid sequence according to SEQ ID NO: 236. In some embodiments, a polyribonucleotide comprises or consists of an amino acid sequence according to SEQ ID NO: 258.

[0034] In some embodiments, a polypeptide comprises an HSV-1 gD secretory signal, one or more RL2 polypeptides or antigenic fragments thereof, one or more RS1 polypeptides or antigenic fragments thereof, one or more UL54 polypeptides or antigenic fragments thereof, and a VSV-G transmembrane region. In some embodiments, a polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an RL2 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, an RS1 polypeptide or antigenic fragment thereof, a linker, a UL54 polypeptide or antigenic fragment thereof, a linker, and a VSV-G transmembrane region. In some embodiments, a polypeptide comprises or consists of an amino acid sequence according to SEQ ID NO: 237. In some embodiments, a polyribonucleotide comprises or consists of an amino acid sequence according to SEQ ID NO: 259.

[0035] In some embodiments, one or more HSV antigens or antigenic fragments thereof comprise one or more HSV glycoproteins. In some embodiments, one or more HSV glycoproteins comprise an HSV glycoprotein B (gB), an HSV glycoprotein E (gE), an HSV glycoprotein G (gG), an HSV glycoprotein H (gH), an HSV glycoprotein I (gI), an HSV glycoprotein L (gL), or a combination thereof.

[0036] In some embodiments, a polypeptide comprises a single HSV antigen. In some embodiments, a single HSV antigen is an HSV glycoprotein. In some embodiments, an HSV glycoprotein is a full-length HSV Page 7 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) glycoprotein. In some embodiments, an HSV glycoprotein is an HSV gB, an HSV gE, an HSV gG, an HSV gH, an HSV gI, and an HSV gL.

[0037] In some embodiments, an HSV glycoprotein is HSV-2 gB. In some embodiments, an HSV-2 gB is or comprises an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NOs: 7, 8, 9, or 74. In some embodiments, an HSV-2 gB consists or comprises an amino acid sequence according to SEQ ID NOs: 7, 8, 9, or 74.

[0038] In some embodiments, an HSV glycoprotein is HSV-2 gE. In some embodiments, an HSV-2 gE is or comprises an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NOs: 66, 67, 68, or 69. In some embodiments, an HSV-2 gE consists or comprises an amino acid sequence according to SEQ ID NOs: 66, 67, 68, or 69. In some embodiments, a sequence at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to SEQ ID NOs: 80, 81, 82, 83, or 84.

[0039] In some embodiments, an HSV glycoprotein is HSV-2 gH. In some embodiments, an HSV-2 gH is or comprises an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 70, 71, 72, or 74. In some embodiments, an HSV-2 gH consists or comprises an amino acid sequence according to SEQ ID NO: 70, 71, 72, or 74.

[0040] In some embodiments, an HSV glycoprotein is HSV-2 gI. In some embodiments, an HSV-2 gI is or comprises an amino acid sequence that is at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identical to SEQ ID NO: 62, 63, 64, or 65. In some embodiments, an HSV-2 gI consists or comprises an amino acid sequence according to SEQ ID NO: 62, 63, 64, or 65. In some embodiments, a sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to SEQ ID NO: 75, 76, 77, 78, or 79.

[0041] In some embodiments, an HSV glycoprotein is HSV-2 gL. In some embodiments, an HSV-2 gL is or comprises an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NOs: 1, 2, or 3. In some embodiments, an HSV-2 gL consists or comprises an amino acid sequence according to SEQ ID NOs: 1, 2, or 3.

[0042] In some embodiments, a polypeptide comprises a secretory signal. In some embodiments, a secretory signal comprises or consists of a viral secretory signal. In some embodiments, a viral secretory signal comprises or consists of an HSV secretory signal. In some embodiments, a secretory signal is a heterologous secretory signal. In some embodiments, a HSV secretory signal comprises or consists of an HSV-1 or HSV-2 secretory signal.

[0043] In some embodiments, an HSV secretory signal is selected from: a) a gD2 secretory signal; b) a gD1 secretory signal; c) a gB1 secretory signal; d) a gI2 secretory signal; e) a gE2 secretory signal; f) a gC2 secretory signal; g) an Eboz secretory signal; h) an IL2 secretory signal; and i) an HLA-DR secretory signal.

[0044] In some embodiments, an HSV secretory signal comprises or consists of an HSV gD secretory signal. In some embodiments, an HSV gD secretory signal comprises or consists an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or Page 8 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 100% identical to SEQ ID NO: 87. In some embodiments, an HSV gD secretory signal comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 88. In some embodiments, an HSV gD secretory signal consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 110. In some embodiments, an HSV gD secretory signal consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 111.

[0045] In some embodiments, a secretory signal is located at the N-terminus of the polypeptide.

[0046] In some embodiments, an HSV secretory signal comprises or consists of an HSV-2 glycoprotein I (gI) secretory signal.

[0047] In some embodiments, an HSV-2 gI secretory signal comprises an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 107.

[0048] In some embodiments, an HSV-2 gI secretory signal comprises an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 108.

[0049] In some embodiments, a polypeptide comprises a transmembrane region. In some embodiments, a transmembrane region comprises or consists of a viral transmembrane region. In some embodiments, a transmembrane region comprises or consists of an HSV transmembrane region. In some embodiments, an HSV transmembrane region comprises or consists of an HSV-1 or HSV-2 transmembrane region. In some embodiments, an HSV transmembrane region comprises or consists of an HSV gD transmembrane region. In some embodiments, an HSV gD transmembrane region consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 160.

[0050] In some embodiments, a polypeptide does not comprise a transmembrane region.

[0051] In some embodiments, a polypeptide comprises a multimerization domain.

[0052] In some embodiments, a polypeptide comprises one or more linkers. In some embodiments, one or more linkers comprise one or more glycine (G) residues and / or one or more serine (S) residues. In some embodiments, one or more linkers comprise or consist of an amino acid sequence according to SEQ ID NO: 163. In some embodiments, one or more linkers comprise or consist of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 165. In some embodiments, one or more linkers comprise or consist of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 168. In some embodiments, one or more linkers comprise or consist of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 217.

[0053] In some embodiments, a polyribonucleotide is an isolated polyribonucleotide. Page 9 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0054] In some embodiments, a polyribonucleotide is an engineered polyribonucleotide.

[0055] In some embodiments, a polyribonucleotide is a codon-optimized polyribonucleotide.

[0056] The present disclosure also provides an RNA construct.

[0057] In some embodiments, an RNA construct comprising in 5' to 3' order: (i) a 5' UTR; (ii) a polyribonucleotide of any according to the present disclosure; (iii) a 3' UTR; and (iv) a polyA tail sequence. In some embodiments, an RNA construct comprises (i) a 5' UTR that comprises or consists of a modified human alpha-globin 5'-UTR; (ii) a 3' UTR comprises or consists of a first sequence from the amino terminal enhancer of split (AES) messenger RNA and a second sequence from the mitochondrial encoded 12S ribosomal RNA; or (iii) both.

[0058] In some embodiments, a 5' UTR comprises or consists of a ribonucleic acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 208. In some embodiments, a 5' UTR comprises or consists of a ribonucleic acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 209. In some embodiments, a 3' UTR comprises or consists ribonucleic acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 215. In some embodiments, a 3' UTR comprises or consists of a ribonucleic acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 216. In some embodiments, a polyA tail sequence is a split polyA tail sequence. In some embodiments, a split polyA tail sequence consists of a ribonucleic acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical a ribonucleic acid sequence selected from SEQ ID NOs: 210, 212, or 213. In some embodiments, an RNA construct further comprising a 5' cap. In some embodiments, an RNA construct a cap proximal sequence comprising positions +1, +2, +3, +4, and +5 of the polyribonucleotide. In some embodiments, a 5' cap comprises or consists of m7(3’OMeG)(5')ppp(5')(2'OMeA1)pG2, wherein A1is position +1 of the polyribonucleotide, and G2is position +2 of the polyribonucleotide. In some embodiments, a cap proximal sequence comprises A1and G2of the Cap1 structure, and a sequence comprising: A3A4U5(SEQ ID NO: 207) at positions +3, +4 and +5 respectively of the polyribonucleotide.

[0059] In some embodiments, a polyribonucleotide includes modified uridines in place of all uridines, optionally wherein modified uridines are each N1-methyl-pseudouridine.

[0060] The present disclosure also provides a composition.

[0061] In some embodiments, a composition comprises one or more polyribonucleotides according to the present disclosure. In some embodiments, a composition comprises one or more RNA constructs as provided herein. In some embodiments, a composition further comprises lipid nanoparticles, polyplexes (PLX), lipidated polyplexes (LPLX), or liposomes, wherein the one or more polyribonucleotides are fully or partially encapsulated within the lipid nanoparticles, polyplexes (PLX), lipidated polyplexes (LPLX), or liposomes. In some embodiments, a composition further comprises lipid nanoparticles, wherein the one or more polyribonucleotides are encapsulated within the lipid nanoparticles.

[0062] The present disclosure also provides a pharmaceutical composition. Page 10 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0063] In some embodiments, a pharmaceutical composition comprises a composition according to the present disclosure and at least one pharmaceutically acceptable excipient. In some embodiments, a pharmaceutical comprises a cryoprotectant, optionally wherein the cryoprotectant is sucrose. In some embodiments, a pharmaceutical comprises an aqueous buffered solution, optionally wherein the aqueous buffered solution comprises one or more of Tris base, Tris HCl, NaCl, KCl, Na2HPO4, and KH2PO4.

[0064] The present disclosure also provides a combination.

[0065] In some embodiments, a combination comprises a first polyribonucleotide according to the present disclosure; and a second polyribonucleotide according to the present disclosure, wherein the first polyribonucleotide and the second polyribonucleotide are different.

[0066] In some embodiments, a combination comprises a first pharmaceutical composition comprising a first polyribonucleotide, wherein the first polyribonucleotide is a polyribonucleotide according to the present disclosure; and a second pharmaceutical composition comprising a second polyribonucleotide, wherein the second polyribonucleotide is a polyribonucleotide according to the present disclosure, wherein the first polyribonucleotide and the second polyribonucleotide are different.

[0067] In some embodiments, a combination comprises a first polyribonucleotide according to the present disclosure; and a second polyribonucleotide encoding a second polypeptide, wherein the second polypeptide comprises one or more HSV RL2 polypeptides or antigenic fragments thereof, one or more HSV RS1 polypeptides or antigenic fragments thereof, and one or more HSV UL54 polypeptides or antigenic fragments thereof. In some embodiments, a combination comprising: a first pharmaceutical composition comprises a first polyribonucleotide, wherein the first polyribonucleotide is a polyribonucleotide according to the present disclosure; and a second pharmaceutical composition comprising a second polyribonucleotide, wherein the second polyribonucleotide comprises one or more HSV RL2 polypeptides or antigenic fragments thereof, one or more HSV RS1 polypeptides or antigenic fragments thereof, and one or more HSV UL54 polypeptides or antigenic fragments thereof. In some embodiments, a second polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an RL2 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, an RS1 polypeptide or antigenic fragment thereof, a linker, a UL54 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 197. In some embodiments, a second polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an UL54 polypeptide or antigenic fragment thereof, a linker, an RS1 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, a RL2 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 201. In some embodiments, a second polypeptide comprises, in N-terminus to C-terminus order, an HSV-2 gD secretory signal, an RL2 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, an RS1 polypeptide or antigenic fragment thereof, a linker, a UL54 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second polypeptide comprises or consists of an amino acid sequence that is at least Page 11 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 205.

[0068] In some embodiments, a combination comprises a first polyribonucleotide according to the present disclosure; and a second polyribonucleotide encoding a second polypeptide, wherein the second polypeptide comprises one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL49 polypeptides or antigenic fragments thereof, and one or more HSV UL9 polypeptides or antigenic fragments thereof. In some embodiments, a combination comprises a first pharmaceutical composition comprising a first polyribonucleotide, wherein the first polyribonucleotide is a polyribonucleotide according to the present disclosure; and a second pharmaceutical composition comprising a second polyribonucleotide, wherein the second polypeptide comprises one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL49 polypeptides or antigenic fragments thereof, and one or more HSV UL9 polypeptides or antigenic fragments thereof. In some embodiments, a second polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an UL29 polypeptide or antigenic fragment thereof, a linker, an UL39 polypeptide or antigenic fragment thereof, a linker, an UL49 polypeptide or antigenic fragment thereof, a linker, a UL9 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 198. In some embodiments, a second polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an UL9 polypeptide or antigenic fragment thereof, a linker, an UL49 polypeptide or antigenic fragment thereof, a linker, an UL39 polypeptide or antigenic fragment thereof, a linker, a UL29 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 202.

[0069] In some embodiments, a combination comprises a first polyribonucleotide according to the present disclosure; and a second polyribonucleotide encoding a second polypeptide, wherein the second polypeptide comprises one or more HSV UL30 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, and one or more HSV UL52 polypeptides or antigenic fragments thereof. In some embodiments, a combination comprises a first pharmaceutical composition comprising a first polyribonucleotide, wherein the first polyribonucleotide is a polyribonucleotide according to the present disclosure; and a second pharmaceutical composition comprising a second polyribonucleotide, wherein the second polypeptide comprises one or more HSV UL30 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, and one or more HSV UL52 polypeptides or antigenic fragments thereof. In some embodiments, a second polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an UL30 polypeptide or antigenic fragment thereof, a linker, an UL30 polypeptide or antigenic fragment thereof, a linker, an UL40 polypeptide or antigenic fragment thereof, a linker, a UL5 polypeptide or antigenic fragment thereof, a linker, a UL5 polypeptide or antigenic fragment thereof, a linker, a UL52 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second polypeptide comprises or consists Page 12 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 199. In some embodiments, a second polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an UL52 polypeptide or antigenic fragment thereof, a linker, an UL5 polypeptide or antigenic fragment thereof, a linker, an UL5 polypeptide or antigenic fragment thereof, a linker, a UL40 polypeptide or antigenic fragment thereof, a linker, a UL30 polypeptide or antigenic fragment thereof, a linker, a UL30 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 203.

[0070] In some embodiments, a combination comprises a first polyribonucleotide according to the present disclosure; and a second polyribonucleotide encoding a second polypeptide, wherein the second polypeptide comprises one or more HSV UL1 polypeptides or antigenic fragments thereof, one or more HSV UL19 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, one or more HSV UL27 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more UL48 polypeptides or antigenic fragments thereof, and one or more HSV UL25 polypeptides or antigenic fragments thereof. In some embodiments, a combination comprises a first pharmaceutical composition comprising a first polyribonucleotide, wherein the first polyribonucleotide is a polyribonucleotide according to the present disclosure; and a second pharmaceutical composition comprising a second polyribonucleotide, wherein the second polypeptide comprises one or more HSV UL1 polypeptides or antigenic fragments thereof, one or more HSV UL19 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, one or more HSV UL27 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more UL48 polypeptides or antigenic fragments thereof, and one or more HSV UL25 polypeptides or antigenic fragments thereof In some embodiments, a second polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an HSV UL1 polypeptide or antigenic fragment thereof, a linker, an HSV UL19 polypeptide or antigenic fragment thereof, a linker, an HSV UL21 polypeptide or antigenic fragment thereof, a linker, an HSV UL27 polypeptide or antigenic fragment thereof, a linker, an HSV UL27 polypeptide or antigenic fragment thereof, a linker, an HSV UL46 polypeptide or antigenic fragment thereof, a linker, an HSV UL47 polypeptide or antigenic fragment thereof, a linker, an HSV UL25 polypeptide or antigenic fragment thereof, a linker, an HSV UL48 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 200. In some embodiments, a second polypeptide comprises, in N-terminus to C- terminus order, an HSV-1 gD secretory signal, an HSV UL48 polypeptide or antigenic fragment thereof, a linker, an HSV UL25 polypeptide or antigenic fragment thereof, a linker, an HSV UL47 polypeptide or antigenic fragment thereof, a linker, an HSV UL46 polypeptide or antigenic fragment thereof, a linker, an HSV UL27 polypeptide or antigenic fragment thereof, a linker, an HSV UL27 polypeptide or antigenic fragment thereof, a linker, an HSV UL21 polypeptide or antigenic fragment thereof, a linker, an HSV UL19 polypeptide or antigenic fragment thereof, a linker, an HSV UL1 polypeptide or antigenic fragment thereof, a linker, and a MITD. In some embodiments, a second Page 13 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) polypeptide comprises or consists of an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NO: 204.

[0071] In some embodiments, a second polypeptide is an HSV gB. In some embodiments, a second polypeptide consists or comprises an amino acid sequence that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to SEQ ID NOs: 7, 8, 9, or 74.

[0072] The present disclosure also provides a method that comprises administering a polyribonucleotide according to the present disclosure, or an RNA construct according to the present disclosure, to a subject.

[0073] The present disclosure also provides a method that comprises administering a composition according to the present disclosure, to a subject.

[0074] The present disclosure also provides a method that comprises administering one or more doses of the composition according to the present disclosure or the pharmaceutical composition according to the present disclosure, to a subject.

[0075] The present disclosure also provides a method that comprises administering a combination according to the present disclosure, to a subject.

[0076] The present disclosure also provides a pharmaceutical composition according to the present disclosure, for use in the treatment of an HSV infection comprising administering one or more doses of the pharmaceutical composition to a subject.

[0077] The present disclosure also provides a pharmaceutical composition according to the present disclosure, for use in the prevention of an HSV infection comprising administering one or more doses of the pharmaceutical composition to a subject.

[0078] In some embodiments, a method according to the present disclosure or a pharmaceutical composition according to the present disclosure for use, comprises administering two or more doses of the pharmaceutical composition to a subject.

[0079] In some embodiments, a method according to the present disclosure or a pharmaceutical composition for use according to the present disclosure, comprises administering three or more doses of the pharmaceutical composition to a subject.

[0080] The present disclosure also provides a method comprising administering a combination according to the present disclosure to a subject. In some embodiments, a first pharmaceutical composition and the second pharmaceutical composition are administered on the same day. In some embodiments, a first pharmaceutical composition and the second pharmaceutical composition are administered on different days. In some embodiments, a first pharmaceutical composition and a second pharmaceutical composition are administered to the subject at different locations on the subject’s body. In some embodiments, a method is a method of treating an HSV infection. In some embodiments, a method is a method of preventing an HSV infection. In some embodiments, a subject has or is at risk of developing an HSV infection.

[0081] In some embodiments, a subject is a human. Page 14 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0082] In some embodiments, administration induces an anti-HSV immune response in the subject. In some embodiments, an anti-HSV immune response in the subject comprises an adaptive immune response. In some embodiments, an anti-HSV immune response in the subject comprises a T-cell response. In some embodiments, a T- cell response is or comprises a CD4+ T cell response. In some embodiments, a T-cell response is or comprises a CD8+ T cell response. In some embodiments, an anti-HSV immune system response comprises a B-cell response. In some embodiments, an anti-HSV immune system response comprises the production of antibodies directed against the one or more HSV antigens or antigenic fragments thereof that is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99% or 100% identical to one or more sequences selected from SEQ ID NOs: 1-74, 260-270, or an antigenic fragment thereof.

[0083] The present disclosure also provides use of a pharmaceutical composition according to the present disclosure, in the treatment of a herpes simplex virus infection.

[0084] The present disclosure also provides use of a pharmaceutical composition according to the present disclosure in the prevention of a herpes simplex virus infection.

[0085] The present disclosure also provides use of a pharmaceutical composition according to the present invention, in inducing an anti-herpes simplex immune virus response in a subject.

[0086] The present disclosure also provides a polypeptide encoded by a polyribonucleotide according to the present disclosure.

[0087] The present disclosure also provides a polypeptide encoded by an RNA construct as provided herein.

[0088] The present disclosure also provides a host cell comprising a polyribonucleotide according to the present disclosure.

[0089] The present disclosure also provides host cell comprising an RNA construct according to the present disclosure.

[0090] The present disclosure also provides host cell comprising a polypeptide according to the present disclosure. BRIEF DESCRIPTION OF THE DRAWING

[0091] FIG.1 is a schematic of an HSV particle.

[0092] FIG.2 is a schematic overview of the HSV life cycle. FIG.2 has been modified from Ibanez, F.J., et al., “Experimental Dissection of the Lytic Replication Cycles of Herpes Simplex Virus in vitro,” Front Microbiol. 2018; 9: 2406, which is incorporated herein by reference in its entirety.

[0093] FIG.3 is a schematic of a model of HSV latent infection. FIG.3 has been modified from Knipe, D.M., et al., “Clues to mechanisms of herpesviral latent infection and potential cures,” PNAS September 29, 2015112 (39) 11993-11994, which is incorporated herein by reference in its entirety. Page 15 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0094] FIG.4 is a summary table of clinical trial results with candidate HSV compositions. The table has been modified from Aschner, C. B., & Herold, B. C. (2021), Alphaherpesvirus vaccines. Current Issues in Molecular Biology, 41, 469-508, which is incorporated herein by reference in its entirety.

[0095] FIG.5 is a summary table of HSV-2 composition candidates in preclinical development. The table has been modified from Aschner, C. B., & Herold, B. C. (2021), Alphaherpesvirus vaccines. Current Issues in Molecular Biology, 41, 469-508, which is incorporated herein by reference in its entirety.

[0096] FIG.6 is a heat map assessing the phylogeny and homology of HSV-1 and HSV-2 genes. As shown, HSV-1 and HSV-2 genes are homologous with ~75% sequence identity. HSV-2 demonstrates minimal cross- strain variability.

[0097] FIG.7 includes a line graph depicting the time post HSV infection when intermediate early, early, and late genes are expressed.

[0098] FIG.8 is a table showing certain characteristics of data analyzed from Hosken 2006, Jing 2012, and Long 2014, including HSV species, number of subjects, number of genes assayed, experimental methodology, and symptom status of subjects.

[0099] FIG.9 is a graph showing the percent of subjects in data analyzed from Hosken 2006 that were determined to have T cells targeting products of each of 48 analyzed HSV genes, respectively, at a level above the indicated threshold (greater than 20 SFU / 106). Data were extracted from the figures of Hosken 2006.

[0100] FIG.10 is a graph showing the percent of subjects in data analyzed from Long 2014 that were determined to have T cells and / or CD4 T cells targeting products of each of 75 analyzed HSV genes, respectively. Data were extracted from the figures of Long 2014.

[0101] FIG.11 is a set of three graphs showing correlation of T cells detected as targeting each of a range of individual HSV genes between pairs of data sets analyzed from literature, in particular between Hosken 2006 and Jing 2012, between Hosken 2006 and Long 2014, or between Jing 2012 and Long 2014. R values are shown for each graph. Hosken 2006 / Jing 2012 correlated observed despite different species (Jing 2012 HSV-1, Hosken 2006 HSV-2). No correlation was observed for data from Long 2014 with either of Hosken 2006 or Jing 2012.

[0102] FIG.12 is a chart showing expression levels for each of a range of HSV genes as determined from analysis of a multiple data sets from diverse sources, including human cells, mice, and DRG from latently infected tree shrews. A dashed horizontal line shows determined median expression.

[0103] FIG.13 is a chart plotting data from Hosken 2006 with respect to % of T cells targeting HSV gene products and median expression (see FIG.12) for each of a variety of HSV genes. Threshold values indicate genes that are immunogenic and well expressed (upper right quadrant based on dashed lines indicating threshold values).

[0104] FIG.14 is a chart plotting data from Jing 2012 with respect to % of T cells targeting HSV gene products and median expression (see FIG.12) for each of a variety of HSV genes. Threshold values indicate genes that are immunogenic and well expressed (upper right quadrant based on dashed lines indicating threshold values). Page 16 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0105] FIG.15 depicts conservation scores determined for amino acids located at positions along an RL2 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0106] FIG.16 depicts conservation scores determined for amino acids located at positions along an RS1 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0107] FIG.17 depicts conservation scores determined for amino acids located at positions along an UL19 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0108] FIG.18 depicts conservation scores determined for amino acids located at positions along an UL1 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0109] FIG.19 depicts conservation scores determined for amino acids located at positions along an UL21 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0110] FIG.20 depicts conservation scores determined for amino acids located at positions along an UL25 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0111] FIG.21 depicts conservation scores determined for amino acids located at positions along an UL27consensus sequence. The UL27 encodes the HSV gB. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0112] FIG.22 depicts conservation scores determined for amino acids located at positions along an UL29 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0113] FIG.23 depicts conservation scores determined for amino acids located at positions along an UL30 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0114] FIG.24 depicts conservation scores determined for amino acids located at positions along an UL39 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0115] FIG.25 depicts conservation scores determined for amino acids located at positions along an UL40 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively. Page 17 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0116] FIG.26 depicts conservation scores determined for amino acids located at positions along an UL46 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0117] FIG.27 depicts conservation scores determined for amino acids located at positions along an UL47 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0118] FIG.28 depicts conservation scores determined for amino acids located at positions along an UL48 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0119] FIG.29 depicts conservation scores determined for amino acids located at positions along an UL49 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0120] FIG.30 depicts conservation scores determined for amino acids located at positions along an UL52 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0121] FIG.31 depicts conservation scores determined for amino acids located at positions along an UL54 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0122] FIG.32 depicts conservation scores determined for amino acids located at positions along an UL5 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0123] FIG.33 depicts conservation scores determined for amino acids located at positions along an UL9 consensus sequence. For this analysis, complete HSV-1 and HSV-2 genomes were downloaded from VIPR database, and HSV-1 strain 17 and HSV-2 strain HG52 were used as reference strains for HSV-1 and HSV-2 respectively.

[0124] FIG.34 depicts HSV strain conservation scores determined for amino acids located at positions along an RL2 consensus sequence.

[0125] FIG.35 depicts HSV strain conservation scores determined for amino acids located at positions along an RS1consensus sequence.

[0126] FIG.36 depicts HSV strain conservation scores determined for amino acids located at positions along an UL19 consensus sequence.

[0127] FIG.37 depicts HSV strain conservation scores determined for amino acids located at positions along an UL1 consensus sequence.

[0128] FIG.38 depicts HSV strain conservation scores determined for amino acids located at positions along an UL21 consensus sequence. Page 18 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0129] FIG.39 depicts HSV strain conservation scores determined for amino acids located at positions along an UL25 consensus sequence.

[0130] FIG.40 depicts HSV strain conservation scores determined for amino acids located at positions along an UL27 consensus sequence.

[0131] FIG.41 depicts HSV strain conservation scores determined for amino acids located at positions along an UL29 consensus sequence.

[0132] FIG.42 depicts HSV strain conservation scores determined for amino acids located at positions along an UL30 consensus sequence.

[0133] FIG.43 depicts HSV strain conservation scores determined for amino acids located at positions along an UL39 consensus sequence.

[0134] FIG.44 depicts HSV strain conservation scores determined for amino acids located at positions along an UL40 consensus sequence.

[0135] FIG.45 depicts HSV strain conservation scores determined for amino acids located at positions along an UL46 consensus sequence.

[0136] FIG.46 depicts HSV strain conservation scores determined for amino acids located at positions along an UL47 consensus sequence.

[0137] FIG.47 depicts HSV strain conservation scores determined for amino acids located at positions along an UL48 consensus sequence.

[0138] FIG.48 depicts HSV strain conservation scores determined for amino acids located at positions along an UL49 consensus sequence.

[0139] FIG.49 depicts HSV strain conservation scores determined for amino acids located at positions along an UL52 consensus sequence.

[0140] FIG.50 depicts HSV strain conservation scores determined for amino acids located at positions along an UL54 consensus sequence.

[0141] FIG.51 depicts HSV strain conservation scores determined for amino acids located at positions along an UL5 consensus sequence.

[0142] FIG.52 depicts HSV strain conservation scores determined for amino acids located at positions along an UL9 consensus sequence.

[0143] FIGS.53A-53D depict four HSV antigen constructs, referred to as A) RNA construct 1 (Het 1), B) RNA construct 3 (Het 3), C) RNA construct 5 (Het 5), and D) RNA construct 7 (Het 7). RNA construct 1 (Het 1) includes RL2, RL2, RS1 and UL54 T cell antigenic fragments. RNA construct 3 (Het 3) includes UL29, UL39, UL49, and UL9 T cell antigenic fragments. RNA construct 5 (Het 5) includes UL30, UL40, UL5, and UL52 T cell antigenic fragments. RNA construct 7 (Het 7) includes UL1, UL19, UL21, UL27, UL46, UL47, UL25 and UL48 T cell antigenic fragments. Page 19 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0144] FIGS.54A-54B depict HSV proteins split by kinetics A) or all proteins together B) in cells infected with HSV-2.

[0145] FIGS.55A-55D depict four HSV antigen constructs referred to as A) RNA construct 1 (Het 1), B) RNA construct 4 (Het 4), C) RNA construct 6 (Het 6), and D) RNA construct 8 (Het 8). RNA construct 1 (Het 1) includes RL2, RL2, RS1 and UL54 T cell antigenic fragments. RNA construct 4 (Het 4) includes UL9, UL49, UL39, and UL29 T cell antigenic fragments. RNA construct 6 (Het 6) includes UL52, UL5.1, UL5.2, UL40, UL30.1, and T cell antigenic fragments. RNA construct 8 (Het 8) includes UL48, UL25, UL47, UL46, UL27.1, UL27.2, UL21, UL19, and UL1 T cell antigenic fragments. HLA-I peptides were detected by mass spectrometry.

[0146] FIGS.56A-56B depict a graphic overview of all HLA-I epitopes A) and specific A*02:01 epitopes B) in response to RNA construct 1 (Het 1) (SEQ ID NO: 246).

[0147] FIGS.57A-57B depict a graphic overview of all HLA-I epitopes A) and specific A*02:01 epitopes B) in response to RNA construct 4 (Het 4) (SEQ ID NO: 249).

[0148] FIGS.58A-58B depict a graphic overview of all HLA-I epitopes A) and specific A*02:01 epitopes B) in response to RNA construct 6 (Het 6) (SEQ ID NO: 251).

[0149] FIGS.59A-59B depict a graphic overview of all HLA-I epitopes A) and specific A*02:01 epitopes B) in response to RNA construct 6 (Het 6) (SEQ ID NO: 251).

[0150] FIGS.60A-60B depict antigen specific T cell response in mice. A) data is compared to vehicle control; B) data is compared to DMSO. Mice were immunized with 1 ug of each of RNA construct 1 (Het 1), RNA construct 4 (Het 4), RNA construct 6 (Het 6), and RNA construct 8 (Het 8) (Group 5 in Table 23, Example 24).

[0151] FIGS.61A-61B depict antigen specific T cell response in mice. A) data is compared to vehicle control B) data is compared to DMSO. Mice were immunized with 1 ug of each of RNA construct 1 (Het 1) and RNA construct 8 (Het 8) (Group 6 in Table 23 Example 24).

[0152] FIGS.62A-62B depict antigen specific T cell response in mice. A) data is compared to vehicle control; B) data is compared to DMSO. Mice were immunized with 1 ug of each of RNA construct 1 (Het 1), RNA construct 4 (Het 4), and RNA construct 6 (Het 6) (Group 7 in Table 23, Example 24).

[0153] FIG.63 depicts antigen specific T cell response in mice. Mice received saline and data is compared to DMSO.

[0154] FIG.64 depicts antigen specific T cell response for each T-cell antigenic fragment. Fragments were classified as having a low curated score if the fragments resulted in <100 spots per 1x106cells. Fragments were classified as having a moderate curated score if the fragments resulted in 100-300 spots per 1x106cells. Fragment were classified as having a moderate curated score if the fragments resulted in >300 spots per 1x106cells.

[0155] FIGS.65A-65B depict T-cell response to the antigenic fragments. A) non-log data. B) log data. Mice were immunized with 1 ug of each of RNA construct 1 (Het 1), RNA construct 4 (Het 4), RNA construct 6 (Het 6), and RNA construct 8 (Het 8) (Group 5; total 4 ug, 1 ug of each RNA construct). Page 20 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0156] FIGS.66A-66B depict T-cell response to the antigenic fragments. A) non-log data. B) log data. Mice were immunized with 1 ug of each of RNA construct 1 (Het 1), RNA construct 4 (Het 4), and RNA construct 8 (Het 8) (Group 7; total 3 ug, 1 ug of each RNA construct).

[0157] FIGS.67A-67B depict T-cell response to the antigenic fragments. A) non-log data. B) log data. Mice were immunized with 1 ug of each of RNA construct 1 (Het 1), and RNA construct 8 (Het 8) (Group 6; total 2 ug, 1 ug of each RNA construct).

[0158] FIGS.68A-68B depict A) polyfunctional CD4 T- cell response and B) polyfunctional CD8 T cell response in mice immunized with 1 ug of each of RNA construct 1 (Het 1), RNA construct 4 (Het 4), RNA construct 6 (Het 6), and RNA construct 8 (Het 8) (Group 5; total 4 ug, 1 ug of each RNA construct).

[0159] FIGS.69A-69D depict A) UL54, B) UL29, C) UL40, and D) UL47-specific polyfunctional CD8 T- cell response.

[0160] FIG.70 shows a schematic showing an exemplary study design. Specifically, immunized mice (Day 0 and Day 21) were injected with medroxyprogesterone (subcutaneous injection 2mg / mouse at Day 56) and challenged intravaginally with HSV-2 strain MS (1x106PFU HSV-2 (500 LD50)) at Day 63 and monitored for survival, genital disease scoring and vaginal virus titers at days 2 and 4.

[0161] FIG.71 depicts female A02 mice bodyweight 0-12 days post intravaginally challenge with HSV-2 strain MS (1x106PFU HSV-2 (500 LD50)).

[0162] FIG.72 depicts survival curve for female A02 mice 0-12 days post intravaginally challenge with HSV-2 strain MS (1x106PFU HSV-2 (500 LD50)).

[0163] FIGS.73A-73C depict survival curve of female A02 mice immunized with individual RNA constructs. Mice received A) RNA construct 1 (Het 1) or BNT163; B) RNA construct 4 (Het 4) or RNA construct 6 (Het 6); or C) RNA construct 8 (Het 8. BNT163 was used a control: BNT163 is a trivalent composition comprising RNA encoding a glycoprotein C (gC) antigenic fragment, a glycoprotein D (gD) antigenic fragment, and a glycoprotein E (gE) antigenic fragment.

[0164] FIGS.74A-74C depict survival curve of female A02 mice immunized with a combination of RNA constructs. Mice received A) combination of RNA construct 1 (Het 1) an immediate early (IE) string and RNA constructs 4 (Het 4) and 6 (Het 6) both early strings; B) combination of RNA construct 4 (Het 4) an immediate early and RNA construct 8 (Het 8) a late string; or C) all four constructs: RNA construct 1 (Het 1), RNA construct 4 (Het 4), RNA construct 6 (Het 6), and RNA construct 8 (Het 8) (total 4 ug, 1 ug of each string).

[0165] FIGS.75A-75B depict A) survival curve using criteria including clinical readouts such as hindleg paralysis and B) survival curve using criteria excluding hindleg paralysis as a clinical readout for female A02 mice 0- 12 days post intravaginally challenge with HSV-2 strain MS (1x106PFU HSV-2 (500 LD50)) immunized with RNA construct according to Table 23.

[0166] FIGS.76A-76B depict A) survival curve using criteria including clinical readouts such as hindleg paralysis and B) survival curve using criteria excluding hindleg paralysis as a clinical readout for female A02 mice 0- 12 days post intravaginally challenge with HSV-2 strain MS (1x106PFU HSV-2 (500 LD50)) immunized with all four Page 21 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) construct: RNA construct 1 (Het 1), RNA construct 4 (Het 4), RNA construct 6 (Het 6), and RNA construct 8 (Het 8) (total 4 ug, 1 ug of each RNA construct).

[0167] FIGS.77A-77B depict cumulative survival days for A) individual RNA constructs; RNA construct 1 (Het 1), RNA construct 4 (Het 4), RNA construct 6 (Het 6), or RNA construct 8 (Het 8) and B) combination of constructs. BNT163 was used a control: BNT163 is a trivalent composition comprising RNA encoding a glycoprotein C (gC) antigenic fragment, a glycoprotein D (gD) antigenic fragment, and a glycoprotein E (gE) antigenic fragment.

[0168] FIGS.78A-78B depict cumulative survival days for A) all construct and combination of constructs and B) constructs and combination of constructs showing best and worst cumulative survival. BNT163 was used a control: BNT163 is a trivalent composition comprising RNA encoding a glycoprotein C (gC) antigenic fragment, a glycoprotein D (gD) antigenic fragment, and a glycoprotein E (gE) antigenic fragment.

[0169] FIGS.79A-79D depict vaginal titers using A+B) plaque assay or C+D) qPCR at A+C) 2 days after challenge or B+D) 4 days after challenge.

[0170] FIG.80 depicts ten HSV antigen constructs: RNA construct 15 (Het 15); RNA construct 16 (Het 16); RNA construct 17 (Het 17); RNA construct 18 (Het 18); RNA construct 19 (Het 19); RNA construct 20 (Het 20); RNA construct 21 (Het 21); RNA construct 22 (Het 22); RNA construct 23 (Het 23); RNA construct 24 (Het 4). RNA construct 15 and RNA construct 16 are immediate early and late constructs and include RL2.1, UL54, UL47, UL46 and UL21 T cell antigenic fragments. RNA construct 17 and RNA construct 18 are early constructs and include UL29, UL39, UL9, and UL5.1, UL40, and UL30.1 T cell antigenic fragments. RNA construct 19 and RNA construct 20 are immediate early and early constructs and include UL2.1, UL54, UL9, UL39, and UL5.1 T cell antigenic fragments. RNA construct 21 and RNA construct 22 are late and early constructs and include UL47, UL46, UL21, UL5.2, UL40, UL30.1, and UL29 T cell antigenic fragments. RNA construct 23 and RNA construct 24 include UL2.1, U54, UL5.2., UL40, UL47, and UL46 cell antigenic fragments.

[0171] FIGS.81A-81E depict protein expression of RNA constructs shown in FIG.80 by pair with proteasome inhibitor.

[0172] FIGS.82A-82E depict protein expression of RNA constructs shown in FIG.80 by pair without proteasome inhibitor.

[0173] FIGS.83A-83B depict antigen specific T cell response in A02 mice under A) loose saturation (<220 spots per 1x106cells) and B) under stringent saturation (<100 spots per 1x106cells). Mice were immunized with 2 ug of RNA construct 15 (Het 15) and 2 ug of RNA construct 17 (Het 17) (Group 1 in Table 24, Example 26).

[0174] FIGS.84A-84B depict antigen specific T cell response in A02 mice under A) loose saturation (<220 spots per 1x106cells) and B) under stringent saturation (<100 spots per 1x106cells). Mice were immunized with 2 ug of RNA construct 20 (Het 20) and 2 ug of RNA construct 22 (Het 22) (Group 2 in Table 24, Example 26).

[0175] FIGS.85A-85B depict antigen specific T cell response in A02 mice under A) loose saturation (<220 spots per 1x106cells) and B) under stringent saturation (<100 spots per 1x106cells). Mice were immunized with 4 ug of RNA construct 23 (Het 23) and 2 ug of RNA construct 22 (Het 22) (Group 3 in Table 24, Example 26). Page 22 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0176] FIG.86 depicts antigen specific T cell response in Balb / c mice immunized with 2 ug of RNA construct 15 (Het 15) and 2 ug of RNA construct 17 (Het 17) (Group 1 in Table 24, Example 26).

[0177] FIG.87 depicts antigen specific T cell response in Balb / c mice immunized with 2 ug of RNA construct 20 (Het 20) and 2 ug of RNA construct 22 (Het 22) (Group 2 in Table 24, Example 26).

[0178] FIG.88 depicts antigen specific T cell response in Balb / c mice immunized with 4 ug of RNA construct 23 (Het 23) (Group 3 in Table 24, Example 26).

[0179] FIGS.89A-89C depict CD4 and CD8 T-cell responses in mice immunized with 2 ug of RNA construct 15 (Het 15) and 2 ug of RNA construct 17 (Het 17) (Group 1 in Table 24, Example 26). A) total response; B) CD4 depleted and shows CD8 response; and C) CD8 depleted and shows CD4 response.

[0180] FIGS.90A-90B depict CD4 and CD8 T-cell responses in mice immunized with 2 ug of RNA construct 15 (Het 15) and 2 ug of RNA construct 17 (Het 17) (Group 1 in Table 24, Example 26). A) CD8 vs. CD4 response; and B) CD8 to CD4 ratio vs. total responses.

[0181] FIGS.91A-91C depict CD4 and CD8 T-cell response in mice immunized with 4 ug of RNA construct 23 (Het 23) (Group 3 in Table 24, Example 26). A) total response; B) CD4 depleted and shows CD8 response; and C) CD8 depleted and shows CD4 response.

[0182] FIGS.92A-92B depict CD4 and CD8 T-cell response in mice immunized with 4 ug of RNA construct 23 (Het 23) (Group 3 in Table 24, Example 26). A) CD8 vs. CD4 response; and B) CD8 to CD4 ratio vs. total responses.

[0183] FIG.93 shows a schematic showing an exemplary study design. In particular, immunized mice (Day 0 and Day 21) were injected with medroxyprogesterone (subcutaneous injection 2mg / mouse at Day 46) and challenged intravaginally with HSV-2 strain MS (5x103PFU HSV-2 (~10xLD50)) at Day 51 and monitored for survival, genital disease scoring, weight and vaginal virus titers at 6-h, days 2, 4 and 7.

[0184] FIGS.94A-94E depict female mice bodyweight 0-16 days post intravaginally challenge with HSV- 2 strain MS (5x103PFU HSV-2 (~10xLD50)). Mice were administered with A) PBS (Group 1 in Table 26, Example 27); B) 4 ug of RNA construct 23 (Het 23) (Group 2 in Table 26, Example 27); C) with 2 ug of RNA construct 15 (Het 15) and 2 ug of RNA construct 17 (Het 17) (Group 3 in Table 26, Example 27); D) a trivalent (BNT163) composition comprising RNA encoding a glycoprotein C (gC) antigenic fragment, a glycoprotein D (gD) antigenic fragment, and a glycoprotein E (gE) antigenic fragment; and E) combined graph.

[0185] FIG.95 depicts survival for female mice 0-15 days post intravaginally challenge with HSV-2 strain MS (5x103PFU HSV-2 (~10xLD50)).

[0186] FIGS.96A-96B depict effect of RNA construct immunization on vaginal disease following HSV-2 infection.

[0187] FIG.97 depicts vaginal HSV-2 replication kinetics over 7 days.

[0188] FIG.98 depicts cumulative survival for female mice 0-15 days post intravaginally challenge with HSV-2 strain MS (5x103PFU HSV-2 (~10xLD50)). Page 23 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0189] FIGS.99A-99B depict the effect of RNA construct immunizations on HSV-2 replication in mice vaginal cavity. A) day 2 post challenge; and B) day 4 post challenge. TCS-23 = RNA construct 23 (Het 23); TCS- 15+17 = RNA constructs 15+17 (Het 15+ 17); and BNT163 = a trivalent composition comprising RNA encoding a glycoprotein C (gC) antigenic fragment, a glycoprotein D (gD) antigenic fragment, and a glycoprotein E (gE) antigenic fragment.

[0190] FIGS.100A-100B depict the effect of RNA construct immunizations on HSV-2 replication in mice vaginal cavity. A) day 6-h post challenge; and B) day 7 post challenge. TCS-23 = RNA construct 23 (Het 23); TCS- 15+17 = RNA constructs 15+17 (Het 15+ 17); and BNT163 = a trivalent composition comprising RNA encoding a glycoprotein C (gC) antigenic fragment, a glycoprotein D (gD) antigenic fragment, and a glycoprotein E (gE) antigenic fragment. CERTAIN DEFINITIONS

[0191] In general, terminology used herein is in accordance with its understood meaning in the art, unless clearly indicated otherwise. Explicit definitions of certain terms are provided below; meanings of these and other terms in particular instances throughout this specification will be clear to those skilled in the art from context.

[0192] In order that the present invention may be more readily understood, certain terms are first defined below. Additional definitions for the following terms and other terms are set forth throughout the specification.

[0193] About: The term “about”, when used herein in reference to a value, refers to a value that is similar, in context to the referenced value. In general, those skilled in the art, familiar with the context, will appreciate the of variance encompassed by “about” in that context. For example, in some embodiments, the term “about” may encompass a range of values that within 25%, 20%, 19%, 18%, 17%, 16%, 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, or less of the referred value.

[0194] Agent: As used herein, the term “agent”, may refer to a physical entity or phenomenon. In some embodiments, an agent may be characterized by a particular feature and / or effect. In some embodiments, an agent may be a compound, molecule, or entity of any chemical class including, for example, a small molecule, polypeptide, nucleic acid, saccharide, lipid, metal, or a combination or complex thereof. In some embodiments, the term “agent” may refer to a compound, molecule, or entity that comprises a polymer. In some embodiments, the term may refer to a compound or entity that comprises one or more polymeric moieties. In some embodiments, the term “agent” may refer to a compound, molecule, or entity that is substantially free of a particular polymer or polymeric moiety. In some embodiments, the term may refer to a compound, molecule, or entity that lacks or is substantially free of any polymer or polymeric moiety.

[0195] Amino acid: In its broadest sense, as used herein, the term “amino acid” refers to a compound and / or substance that can be, is, or has been incorporated into a polypeptide chain, e.g., through formation of one or more peptide bonds. In some embodiments, an amino acid has the general structure H2N–C(H)(R)–COOH. In some embodiments, an amino acid is a naturally occurring amino acid. In some embodiments, an amino acid is a non-natural amino acid; in some embodiments, an amino acid is a D-amino acid; in some embodiments, an amino acid is an L-amino acid. “Standard amino acid” refers to any of the twenty standard L-amino acids commonly found in naturally occurring peptides. “Nonstandard amino acid” refers to any amino acid, other than the standard amino Page 24 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) acids, regardless of whether it is prepared synthetically or obtained from a natural source. In some embodiments, an amino acid, including a carboxy- and / or amino-terminal amino acid in a polypeptide, can contain a structural modification as compared with the general structure above. For example, in some embodiments, an amino acid may be modified by methylation, amidation, acetylation, pegylation, glycosylation, phosphorylation, and / or substitution (e.g., of the amino group, the carboxylic acid group, one or more protons, and / or the hydroxyl group) as compared with the general structure. In some embodiments, such modification may, for example, alter the circulating half-life of a polypeptide containing the modified amino acid as compared with one containing an otherwise identical unmodified amino acid. In some embodiments, such modification does not significantly alter a relevant activity of a polypeptide containing the modified amino acid, as compared with one containing an otherwise identical unmodified amino acid. As will be clear from context, in some embodiments, the term “amino acid” may be used to refer to a free amino acid; in some embodiments it may be used to refer to an amino acid residue of a polypeptide.

[0196] Antibody agent: As used herein, the term “antibody agent” refers to an agent that specifically binds to a particular antigen. In some embodiments, the term encompasses a polypeptide or polypeptide complex that includes immunoglobulin structural elements sufficient to confer specific binding. For example, in some embodiments, an antibody agent is or comprises a polypeptide whose amino acid sequence includes one or more structural elements recognized by those skilled in the art as a complementarity determining region (CDR); in some embodiments an antibody agent is or comprises a polypeptide whose amino acid sequence includes at least one CDR (e.g., at least one heavy chain CDR and / or at least one light chain CDR) that is substantially identical to one found in a reference antibody. In some embodiments an included CDR is substantially identical to a reference CDR in that it is either identical in sequence or contains between 1-5 amino acid substitutions as compared with the reference CDR. In some embodiments an included CDR is substantially identical to a reference CDR in that it shows at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity with the reference CDR. In some embodiments an included CDR is substantially identical to a reference CDR in that it shows at least 96%, 97%, 98%, 99%, or 100% sequence identity with the reference CDR. In some embodiments an included CDR is substantially identical to a reference CDR in that at least one amino acid within the included CDR is deleted, added, or substituted as compared with the reference CDR but the included CDR has an amino acid sequence that is otherwise identical with that of the reference CDR. In some embodiments an included CDR is substantially identical to a reference CDR in that 1-5 amino acids within the included CDR are deleted, added, or substituted as compared with the reference CDR but the included CDR has an amino acid sequence that is otherwise identical to the reference CDR. In some embodiments an included CDR is substantially identical to a reference CDR in that at least one amino acid within the included CDR is substituted as compared with the reference CDR but the included CDR has an amino acid sequence that is otherwise identical with that of the reference CDR. In some embodiments an included CDR is substantially identical to a reference CDR in that 1-5 amino acids within the included CDR are deleted, added, or substituted as compared with the reference CDR but the included CDR has an amino acid sequence that is otherwise identical to the reference CDR. In some embodiments, an antibody agent is or comprises a polypeptide whose amino acid sequence includes structural elements recognized by those skilled in the art as an immunoglobulin variable domain. In some embodiments, an antibody agent in or comprises a polypeptide whose amino acid sequence includes structural elements recognized by those skilled in the art to correspond to CDRs1, 2, and 3 of an antibody variable domain; in some such embodiments, an antibody agent in or comprises a Page 25 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) polypeptide or set of polypeptides whose amino acid sequence(s) together include structural elements recognized by those skilled in the art to correspond to both heavy chain and light chain variable region CDRs, e.g., heavy chain CDRs 1, 2, and / or 3 and light chain CDRs 1, 2, and / or 3. In some embodiments, an antibody agent is a polypeptide protein having a binding domain which is homologous or largely homologous to an immunoglobulin-binding domain. In some embodiments, an antibody agent may be or comprise a polyclonal antibody preparation. In some embodiments, an antibody agent may be or comprise a monoclonal antibody preparation. In some embodiments, an antibody agent may include one or more constant region sequences that are characteristic of a particular organism, such as a camel, human, mouse, primate, rabbit, rat; in many embodiments, an antibody agent may include one or more constant region sequences that are characteristic of a human. In some embodiments, an antibody agent may include one or more sequence elements that would be recognized by one skilled in the art as a humanized sequence, a primatized sequence, a chimeric sequence, etc. In some embodiments, an antibody agent may be a canonical antibody (e.g., may comprise two heavy chains and two light chains). In some embodiments, an antibody agent may be in a format selected from, but not limited to, intact IgA, IgG, IgE or IgM antibodies; bi- or multi- specific antibodies (e.g., Zybodies®, etc); antibody fragments such as Fab fragments, Fab’ fragments, F(ab’)2 fragments, Fd’ fragments, Fd fragments, and isolated CDRs or sets thereof; single chain Fvs; polypeptide-Fc fusions; single domain antibodies (e.g., shark single domain antibodies such as IgNAR or fragments thereof); cameloid antibodies; masked antibodies (e.g., Probodies®); Small Modular ImmunoPharmaceuticals (“SMIPsTM”); single chain or Tandem diabodies (TandAb®); VHHs; Anticalins®; Nanobodies® minibodies; BiTE®s; ankyrin repeat proteins or DARPINs®; Avimers®; DARTs; TCR-like antibodies;, Adnectins®; Affilins®; Trans-bodies®; Affibodies®; TrimerX®; MicroProteins; Fynomers®, Centyrins®; and KALBITOR®s. In some embodiments, an antibody may lack a covalent modification (e.g., attachment of a glycan) that it would have if produced naturally. In some embodiments, an antibody may contain a covalent modification (e.g., attachment of a glycan, a payload (e.g., a detectable moiety, a therapeutic moiety, a catalytic moiety, etc.), or other pendant group (e.g., poly-ethylene glycol, etc.)).

[0197] Antigen: Those skilled in the art, reading the present specification, will appreciate that the term “antigen” refers to a molecule that is recognized by the immune system, e.g., in particular embodiments the adaptive immune system, such that it elicits an antigen-specific immune response. In some embodiments, an antigen-specific immune response may be or comprise generation of antibodies and / or antigen-specific T cells. In some embodiments, an antigen is a peptide or polypeptide that comprises at least one epitope against which an immune response can be generated. In one embodiment, an antigen is presented by cells of the immune system such as antigen presenting cells like dendritic cells or macrophages. In some embodiments, an antigen or a processed product thereof such as a T-cell antigens is bound by a T- or B-cell receptor, or by an immunoglobulin molecule such as an antibody. Accordingly, an antigen or a processed product thereof may react specifically with antibodies or T lymphocytes (T cells). In one embodiment, an antigen is a parasitic antigen. In accordance with the present disclosure, in some embodiments, an antigen may be delivered by RNA molecules as provided herein. In some embodiments, a peptide or polypeptide antigen can be 2-100 amino acids, including for example, 5 amino acids, 10 amino acids, 15 amino acids, 20 amino acids, 25 amino acids, 30 amino acids, 35 amino acids, 40 amino acids, 45 amino acids, or 50 amino acids in length. In some embodiments, a peptide or polypeptide antigen can be greater than 50 amino acids. In some embodiments, a peptide or polypeptide antigen can be greater than 100 amino acids. In some embodiments, an antigen is recognized by an immune effector cell. In some embodiments, an antigen if Page 26 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) recognized by an immune effector cell is able to induce in the presence of appropriate co-stimulatory signals, stimulation, priming and / or expansion of the immune effector cell carrying an antigen receptor recognizing the antigen. In the context of the embodiments of the present disclosure, in some embodiments, an antigen can be presented or present on the surface of a cell, e.g., an antigen presenting cell. In one embodiment, an antigen is presented by a diseased cell such as a virus-infected cell. In one embodiment, an antigen receptor is a TCR which binds to an epitope of an antigen presented in the context of MHC. In one embodiment, binding of a TCR when expressed by T cells and / or present on T cells to an antigen presented by cells such as antigen presenting cells results in stimulation, priming and / or expansion of said T cells. In one embodiment, binding of a TCR when expressed by T cells and / or present on T cells to an antigen presented on diseased cells results in cytolysis and / or apoptosis of the diseased cells, wherein said T cells preferably release cytotoxic factors, e.g., perforins and granzymes.

[0198] Associated: Two events or entities are “associated” with one another, as that term is used herein, if the presence, level, degree, type and / or form of one is correlated with that of the other. For example, a particular entity genetic signature, metabolite, microbe, etc.) is considered to be associated with a particular disease, disorder, or condition, if its presence, level and / or form correlates with incidence of, susceptibility to, severity of, stage of, etc. the disease, disorder, or condition (e.g., across a relevant population). In some embodiments, two or more entities are physically “associated” with one another if they interact, directly or indirectly, so that they are and / or remain in physical proximity with one another. In some embodiments, two or more entities that are physically associated with one another are covalently linked to one another; in some embodiments, two or more entities that are physically associated with one another are not covalently linked to one another but are non- covalently associated, for example by means of hydrogen bonds, van der Waals interaction, hydrophobic interactions, magnetism, and combinations thereof.

[0199] Binding: Those skilled in the art, reading the present specification, will appreciate that the term “binding” typically refers to a non-covalent association between or among entities or moieties. In some embodiments, binding data are expressed in terms of “IC50”. As is understood in the art, IC50 is the concentration of an assessed agent in a binding assay at which 50% inhibition of binding of reference agent known to bind the relevant binding partner is observed. In some embodiments, assays are run under conditions in which the assays are run (e.g., limiting binding target and reference concentrations), these values approximate KDvalues. Assays for determining binding are well known in the art and are described in detail, for example, in PCT publications WO 94 / 20127 and WO 94 / 03205, and other publications such Sidney et al., Current Protocols in Immunology 18.3.1 (1998); Sidney, et al., J. Immunol. 154:247 (1995); and Sette, et al., Mol. Immunol. 31:813 (1994). Alternatively, binding can be expressed relative to binding by a reference standard peptide. For example, can be based on its IC50, relative to the IC50of a reference standard peptide. Binding can also be determined using other assay systems including those using: live cells (e.g., Ceppellini et al., Nature 339:392 (1989); Christnick et al., Nature 352:67 (1991); Busch et al., Int. Immunol. 2:443 (1990); Hill et al., J. Immunol. 147:189 (1991); del Guercio et al., J. Immunol. 154:685 (1995)), cell free systems using detergent lysates (e.g., Cerundolo et al., J. Immunol 21:2069 (1991)), immobilized purified MHC (e.g., Hill et al., J. Immunol. 152, 2890 (1994); Marshall et al., J. Immunol. 152:4946 (1994)), ELISA systems (e.g., Reay et al., EMBO J. 11:2829 (1992)), surface plasmon resonance (e.g., Khilko et al., J. Biol. Chem. 268:15425 (1993)); high flux soluble phase assays (Hammer et al., J. Exp. Med. Page 27 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 180:2353 (1994)), and measurement of class I MHC stabilization or assembly (e.g., Ljunggren et al., Nature 346:476 (1990); Schumacher et al., Cell 62:563 (1990); Townsend et al., Cell 62:285 (1990); Parker et al., J. Immunol. 149:1896 (1992)).

[0200] Cap: As used herein, the term “cap” refers to a structure comprising or essentially consisting of a nucleoside-5 '-triphosphate that is typically joined to a 5'-end of an uncapped RNA (e.g., an uncapped RNA having a 5'- diphosphate). In some embodiments, a cap is or comprises a guanine nucleotide. In some embodiments, a cap is or comprises a naturally occurring RNA 5’ cap, including, e.g., but not limited to a 7- methylguanosine cap, which has a structure designated as “m7G.” In some embodiments, a cap is or comprises a synthetic cap analog that resembles an RNA cap structure and possesses the ability to stabilize RNA if attached thereto, including, e.g., but not limited to anti-reverse cap analogs (ARCAs) known in the art). Those skilled in the art will appreciate that methods for joining a cap to a 5’ end of an RNA are known in the art. For example, in some embodiments, a capped RNA may be obtained by in vitro capping of RNA that has a 5' triphosphate group or RNA that has a 5' diphosphate group with a capping enzyme system (including, e.g., but not limited to vaccinia capping enzyme system or Saccharomyces cerevisiae capping enzyme system). Alternatively, a capped RNA can be obtained by in vitro transcription (IVT) of a single- stranded DNA template in the presence of a dinucleotide or trinucleotide cap analog.

[0201] Cell-mediated immunity: “Cell-mediated immunity,” “cellular immunity,” “cellular immune response,” or similar terms are meant to include a cellular response directed to cells characterized by expression of an antigen, in particular characterized by presentation of an antigen with class I or class II MHC. A cellular response relates to immune effector cells, in particular to T cells or T lymphocytes which act as either “helpers” or “killers.” The helper T cells (also termed CD4+T cells or CD4 T cells) play a central role by regulating the immune response and the killer cells (also termed cytotoxic T cells, cytolytic T cells, CD8+T cells, CD8 T cells, or CTLs) kill diseased cells such as virus-infected cells, preventing the production of more diseased cells.

[0202] Co-administration: As used herein, the term “co-administration” refers to use of a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) described herein and an additional therapeutic agent. The combined use of a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) described herein and an additional therapeutic agent may be performed concurrently or separately (e.g., sequentially in any order). In some embodiments, a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) described herein and an additional therapeutic agent may be combined in one pharmaceutically acceptable carrier, or they may be placed in separate carriers and delivered to a target cell or administered to a subject at different times. Each of these situations is contemplated as falling within the meaning of “co- administration” or “combination,” provided that a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) described herein and an additional therapeutic agent are delivered or administered sufficiently close in time that there is at least some temporal overlap in biological effect(s) generated by each on a target cell or a subject being treated.

[0203] Codon-optimized: As used herein, the term “codon-optimized” refers to alteration of codons in a coding region of a nucleic acid molecule to reflect the typical codon usage of a host organism without preferably altering the amino acid sequence encoded by the nucleic acid molecule. Within the context of the present disclosure, in some embodiments coding regions are codon-optimized for optimal expression in a subject to be treated using the Page 28 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) RNA molecules provided herein. In some embodiments, codon-optimization may be performed such that codons for which frequently occurring tRNAs are available are inserted in place of “rare codons.” In some embodiments, codon- optimization may include increasing guanosine / cytosine (G / C) content of a coding region of RNA provided herein as compared to the G / C content of the corresponding coding sequence of a wild-type RNA, wherein the amino acid sequence encoded by the RNA is preferably not modified compared to the amino acid sequence.

[0204] Combination therapy: As used herein, the term “combination therapy” refers to those situations in which a subject is simultaneously exposed to two or more therapeutic regimens (e.g., two or more therapeutic agents). In some embodiments, the two or more regimens may be administered simultaneously; in some embodiments, such regimens may be administered sequentially (e.g., all “doses” of a first regimen are administered prior to administration of any doses of a second regimen); in some embodiments, such agents are administered in overlapping dosing regimens. In some embodiments, “administration” of combination therapy may involve administration of one or more agent(s) or modality(ies) to a subject receiving the other agent(s) or modality(ies) in the combination. For clarity, combination therapy does not require that individual agents be administered together in a single composition (or even necessarily at the same time), although in some embodiments, two or more agents, or active moieties thereof, may be administered together in a combination composition.

[0205] Comparable: As used herein, the term “comparable” refers to two or more agents, entities, situations, sets of conditions, etc., that may not be identical to one another but that are sufficiently similar to permit comparison there between so that one skilled in the art will appreciate that conclusions may reasonably be drawn based on differences or similarities observed. In some embodiments, comparable sets of conditions, circumstances, individuals, or populations are characterized by a plurality of substantially identical features and one or a small number of varied features. Those of ordinary skill in the art will understand, in context, what degree of identity is required in any given circumstance for two or more such agents, entities, situations, sets of conditions, etc. to be considered comparable. For example, those of ordinary skill in the art will appreciate that sets of circumstances, individuals, or populations are comparable to one another when characterized by a sufficient number and type of substantially identical features to warrant a reasonable conclusion that differences in results obtained or phenomena observed under or with different sets of circumstances, individuals, or populations are caused by or indicative of the variation in those features that are varied.

[0206] Corresponding to: As used herein, the term “corresponding to” refers to a relationship between two or more entities. For example, the term “corresponding to” may be used to designate the position / identity of a structural element in a compound or composition relative to another compound or composition (e.g., to an appropriate reference compound or composition). For example, in some embodiments, a monomeric residue in a polymer (e.g., an amino acid residue in a polypeptide or a nucleic acid residue in a polynucleotide) may be identified as “corresponding to” a residue in an appropriate reference polymer. For example, those of ordinary skill will appreciate that, for purposes of simplicity, residues in a polypeptide are often designated using a canonical numbering system based on a reference related polypeptide, so that an amino acid “corresponding to” a residue at position 190, for example, need not actually be the 190thamino acid in a particular amino acid chain but rather corresponds to the residue found at 190 in the reference polypeptide; those of ordinary skill in the art readily appreciate how to identify “corresponding” amino acids. For example, those skilled in the art will be aware of various Page 29 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) sequence alignment strategies, including software programs such as, for example, BLAST, CS-BLAST, CUSASW++, DIAMOND, FASTA, GGSEARCH / GLSEARCH, Genoogle, HMMER, HHpred / HHsearch, IDF, Infernal, KLAST, USEARCH, parasail, PSI-BLAST, PSI-Search, ScalaBLAST, Sequilab, SAM, SSEARCH, SWAPHI, SWAPHI-LS, SWIMM, or SWIPE that can be utilized, for example, to identify “corresponding” residues in polypeptides and / or nucleic acids in accordance with the present disclosure. Those of skill in the art will also appreciate that, in some instances, the term “corresponding to” may be used to describe an event or entity that shares a relevant similarity with another event or entity (e.g., an appropriate reference event or entity). To give but one example, a gene or protein in one organism may be described as “corresponding to” a gene or protein from another organism in order to indicate, in some embodiments, that it plays an analogous role or performs an analogous function and / or that it shows a particular degree of sequence identity or homology, or shares a particular characteristic sequence element.

[0207] Derived: In the context of an amino acid sequence (peptide or polypeptide) “derived from” a designated amino acid sequence (peptide or polypeptide), it refers to a structural analogue of a designated amino acid sequence. an amino acid sequence which is derived from a particular amino acid sequence has an amino acid sequence that is identical, essentially identical or homologous to that particular sequence or a fragment thereof. Amino acid sequences derived from a particular amino acid sequence may be variants of that particular sequence or a fragment thereof. For example, it will be understood by one of ordinary skill in the art that the antigens suitable for use herein may be altered such that they vary in sequence from the naturally occurring or native sequences from which they were derived, while retaining the desirable activity of the native sequences.

[0208] Designed: As used herein, the term “designed” refers to an agent (i) whose structure is or was selected by the hand of man; (ii) that is produced by a process requiring the hand of man; and / or (iii) that is distinct from natural substances and other known agents.

[0209] Dosing regimen: Those skilled in the art will appreciate that the term “dosing regimen” may be used to refer to a set of unit doses (typically more than one) that are administered individually to a subject, typically separated by periods of time. In some embodiments, a given therapeutic agent has a recommended dosing regimen, which may involve one or more doses. In some embodiments, a dosing regimen comprises a plurality of doses each of which is separated in time from other doses. In some embodiments, individual doses are separated from one another by a time period of the same length; in some embodiments, a dosing regimen comprises a plurality of doses and at least two different time periods separating individual doses. In some embodiments, all doses within a dosing regimen are of the same unit dose amount. In some embodiments, different doses within a dosing regimen are of different amounts. In some embodiments, a dosing regimen comprises a first dose in a first dose amount, followed by one or more additional doses in a second dose amount different from the first dose amount. In some embodiments, a dosing regimen comprises a first dose in a first dose amount, followed by one or more additional doses in a second dose amount same as the first dose amount. In some embodiments, a dosing regimen is correlated with a desired or beneficial outcome when administered across a relevant population (i.e., is a therapeutic dosing regimen).

[0210] Encode: As used herein, the term “encode” or “encoding” refers to sequence information of a first molecule that guides production of a second molecule having a defined sequence of nucleotides (e.g., mRNA) or a Page 30 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) defined sequence of amino acids. For example, a DNA molecule can encode an RNA molecule (e.g., by a transcription process that includes a DNA-dependent RNA polymerase enzyme). An RNA molecule can encode a polypeptide (e.g., by a translation process). Thus, a gene, a cDNA, or an RNA molecule (e.g., an mRNA) encodes a polypeptide if transcription and translation of RNA corresponding to that gene produces the polypeptide in a cell or other biological system. In some embodiments, a coding region of an RNA molecule encoding a target antigen refers to a coding strand, the nucleotide sequence of which is identical to the RNA sequence of such a target antigen. In some embodiments, a coding region of an RNA molecule encoding a target antigen refers to a non-coding strand of such a target antigen, which may be used as a template for transcription of a gene or cDNA.

[0211] Engineered: In general, the term “engineered” refers to the aspect of having been manipulated by the hand of man. For example, a polynucleotide is considered to be “engineered” when two or more sequences that are not linked together in that order in nature are manipulated by the hand of man to be directly linked to one another in the engineered polynucleotide and / or when a particular residue in a polynucleotide is non-naturally occurring and / or is caused through action of the hand of man to be linked with an entity or moiety with which it is not linked in nature.

[0212] Epitope: As used herein, the term “epitope” refers to a moiety that is specifically recognized by an immunoglobulin (e.g., antibody or receptor) binding component. For example, an epitope may be recognized by a T cell, a B cell, or an antibody. In some embodiments, an epitope is comprised of a plurality of chemical atoms or groups on an antigen. In some embodiments, such chemical atoms or groups are surface-exposed when the antigen adopts a relevant three-dimensional conformation. In some embodiments, such chemical atoms or groups are physically near to each other in space when the antigen adopts such a conformation. In some embodiments, at least some such chemical atoms are groups are physically separated from one another when the antigen adopts an alternative conformation (e.g., is linearized). Accordingly, in some embodiments, an epitope of an antigen may include a continuous or discontinuous fragment of the antigen. In some embodiments, an epitope is or comprises a T cell epitope. In some embodiments, an epitope may have a length of about 5 to about 30 amino acids, or about 10 to about 25 amino acids, or about 5 to about 15 amino acids, or about 5 to 12 amino acids, or about 6 to about 9 amino acids.

[0213] Expression: As used herein, the term “expression” of a nucleic acid sequence refers to the generation of a gene product from the nucleic acid sequence. In some embodiments, a gene product can be a transcript. In some embodiments, a gene product can be a polypeptide. In some embodiments, expression of a nucleic acid sequence involves one or more of the following: (1) production of an RNA template from a DNA sequence (e.g., by transcription); (2) processing of an RNA transcript (e.g., by splicing, editing, etc.); (3) translation of an RNA into a polypeptide or protein; and / or (4) post-translational modification of a polypeptide or protein.

[0214] Five prime untranslated region: As used herein, the terms “five prime untranslated region” or “5’ UTR” refer to a sequence of an RNA molecule between a transcription start site and a start codon of a coding region of an RNA. In some embodiments, “5’ UTR” refers to a sequence of an mRNA molecule that begins at a transcription start site and ends one nucleotide (nt) before a start codon (usually AUG) of a coding region of an RNA molecule, e.g., in its natural context. Page 31 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0215] Fragment: The term “fragment” as used herein in the context of a nucleic acid sequence (e.g., RNA sequence) or an amino acid sequence may typically be a fragment of a reference sequence. In some embodiments, a reference sequence is a full-length sequence of e.g., a nucleic acid sequence or an amino acid sequence. Accordingly, a fragment, typically, refers to a sequence that is identical to a corresponding stretch within a reference sequence. In some embodiments, a fragment comprises a continuous stretch of nucleotides or amino acid residues that corresponds to at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95% of the total length of a reference sequence from which the fragment is derived. In some embodiments, the term “fragment", with reference to an amino acid sequence (peptide or polypeptide), relates to a part of an amino acid sequence, e.g., a sequence which represents the amino acid sequence shortened at the N-terminus and / or C-terminus. In some embodiments, a fragment of an amino acid sequence comprises at least 6, in particular at least 8, at least 12, at least 15, at least 20, at least 30, at least 50, or at least 100 consecutive amino acids from an amino acid sequence.

[0216] Homology: As used herein, the term “homology” or “homolog” refers to the overall relatedness between polynucleotide molecules (e.g., DNA molecules and / or RNA molecules) and / or between polypeptide molecules. In some embodiments, polynucleotide molecules (e.g., DNA molecules and / or RNA molecules) and / or polypeptide molecules are considered to be “homologous” to one another if their sequences are at least 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 99% identical. In some embodiments, polynucleotide molecules (e.g., DNA molecules and / or RNA molecules) and / or polypeptide molecules are considered to be “homologous” to one another if their sequences are at least 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 99% similar (e.g., containing residues with related chemical properties at corresponding positions). For example, as is well known by those of ordinary skill in the art, certain amino acids are typically classified as similar to one another as “hydrophobic” or “hydrophilic” amino acids, and / or as having “polar” or “non-polar” side chains. Substitution of one amino acid for another of the same type may often be considered a “homologous” substitution.

[0217] Humoral immunity: As used herein, the term “humoral immunity” or “humoral immune response” refers to antibody production and the accessory processes that accompany it, including: Th2 activation and cytokine production, germinal center formation and isotype switching, affinity maturation and memory cell generation. It also refers to the effector functions of antibodies, which include pathogen neutralization, classical complement activation, and opsonin promotion of phagocytosis and pathogen elimination.

[0218] Identity: As used herein, the term “identity” refers to the overall relatedness between polynucleotide molecules (e.g., DNA molecules and / or RNA molecules) and / or between polypeptide molecules. In some embodiments, polynucleotide molecules (e.g., DNA molecules and / or RNA molecules) and / or between polypeptide molecules are considered to be “substantially identical” to one another if their sequences are at least 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, or 99% identical. Calculation of the percent identity of two nucleic acid or polypeptide sequences, for example, can be performed by aligning the two sequences for optimal comparison purposes (e.g., gaps can be introduced in one or both of a first and a second sequence for optimal alignment and non-identical sequences can be disregarded for comparison purposes). In certain embodiments, the length of a sequence aligned for comparison purposes is at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 75%, at least 80%, at least 85%, at least Page 32 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or substantially 100% of the length of a reference sequence. The nucleotides at corresponding positions are then compared. When a position in the first sequence is occupied by the same residue (e.g., nucleotide or amino acid) as the corresponding position in the second sequence, then the molecules are identical at that position. The percent identity between the two sequences is a function of the number of identical positions shared by the sequences, taking into account the number of gaps, and the length of each gap, which needs to be introduced for optimal alignment of the two sequences. The comparison of sequences and determination of percent identity between two sequences can be accomplished using a mathematical algorithm. For example, the percent identity between two nucleotide sequences can be determined using the algorithm of Meyers and Miller, 1989, which has been incorporated into the ALIGN program (version 2.0). In some exemplary embodiments, nucleic acid sequence comparisons made with the ALIGN program use a PAM120 weight residue table, a gap length penalty of 12 and a gap penalty of 4. The percent identity between two nucleotide sequences can, alternatively, be determined using the GAP program in the GCG software package using an NWSgapdna.CMP matrix.

[0219] Increased, Induced, or Reduced: As used herein, these terms or grammatically comparable comparative terms, indicate values that are relative to a comparable reference measurement. For example, in some embodiments, an assessed value achieved with a provided pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) may be “increased” relative to that obtained with a comparable reference pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine). Alternatively or additionally, in some embodiments, an assessed value achieved in a subject may be “increased” relative to that obtained in the same subject under different conditions (e.g., prior to or after an event; or presence or absence of an event such as administration of a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) as provided herein, or in a different, comparable subject (e.g., in a comparable subject that differs from the subject of interest in prior exposure to a condition, e.g., absence of administration of a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) as provided herein). In some embodiments, comparative terms refer to statistically relevant differences (e.g., that are of a prevalence and / or magnitude sufficient to achieve statistical relevance). Those skilled in the art will be aware, or will readily be able to determine, in a given context, a degree and / or prevalence of difference that is required or sufficient to achieve such statistical significance. In some embodiments, the term “reduced” or equivalent terms refers to a reduction in the level of an assessed value by at least 5%, at least 10%, at least 20%, at least 50%, at least 75% or higher, as compared to a comparable reference. In some embodiments, the term “reduced” or equivalent terms refers to a complete or essentially complete inhibition, i.e., a reduction to zero or essentially to zero. In some embodiments, the term “increased” or “induced” refers to an increase in the level of an assessed value by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 80%, at least 100%, at least 200%, at least 500%, or higher, as compared to a comparable reference.

[0220] Ionizable: The term “ionizable” refers to a compound or group or atom that is charged at a certain pH. In the context of an ionizable amino lipid, such a lipid or a function group or atom thereof bears a positive charge at a certain pH. In some embodiments, an ionizable amino lipid is positively charged at an acidic pH. In some embodiments, an ionizable amino lipid is predominately neutral at physiological pH values, e.g., in some embodiments about 7.0-7.4, but becomes positively charged at lower pH values. In some embodiments, an ionizable amino lipid may have a pKa within a range of about 5 to about 7. Page 33 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0221] Isolated: The term “isolated” means altered or removed from the natural state. For example, a nucleic acid or a peptide naturally present in a living animal is not “isolated”, but the same nucleic acid or peptide partially or completely separated from the coexisting materials of its natural state is “isolated”. An isolated nucleic acid or protein can exist in substantially purified form, or can exist in a non-native environment such as, for example, a host cell.

[0222] Lipid: As used herein, the terms “lipid” and “lipid-like material” are broadly defined as molecules which comprise one or more hydrophobic moieties or groups and optionally also one or more hydrophilic moieties or groups. Molecules comprising hydrophobic moieties and hydrophilic moieties are also typically denoted as amphiphiles.

[0223] RNA lipid nanoparticle: As used herein, the term “RNA lipid nanoparticle” refers to a nanoparticle comprising at least one lipid and RNA molecule(s). In some embodiments, an RNA lipid nanoparticle comprises at least one ionizable amino lipid. In some embodiments, an RNA lipid nanoparticle comprises at least one ionizable amino lipid, at least one helper lipid, and at least one polymer-conjugated lipid (e.g., PEG-conjugated lipid). In various embodiments, RNA lipid nanoparticles as provided herein can have an average size (e.g., Z-average) of about 100 nm to 1000 nm, or about 200 nm to 900 nm, or about 200 nm to 800 nm, or about 250 nm to about 700 nm. In some embodiments of the present disclosure, RNA lipid nanoparticles can have a particle size (e.g., Z- average) of about 30 nm to about 200 nm, or about 30 nm to about 150 nm, about 40 nm to about 150 nm, about 50 nm to about 150 nm, about 60 nm to about 130 nm, about 70 nm to about 110 nm, about 70 nm to about 100 nm, about 80 nm to about 100 nm, about 90 nm to about 100 nm, about 70 to about 90 nm, about 80 nm to about 90 nm, or about 70 nm to about 80 nm. In some embodiments, an average size of lipid nanoparticles is determined by measuring the particle diameter. In some embodiments, RNA lipid nanoparticles may be prepared by mixing lipids with RNA molecules provided herein.

[0224] Lipidoid: As used herein, a “lipidoid” refers to a lipid-like molecule. In some embodiments, a lipoid is an amphiphilic molecule with one or more lipid-like physical properties. In the context of the present disclosure, the term lipid is considered to encompass lipidoids.

[0225] Nanoparticle: As used herein, the term “nanoparticle” refers to a particle having an average size suitable for parenteral administration. In some embodiments, a nanoparticle has a longest dimension (e.g., a diameter) of less than 1,000 nanometers (nm). In some embodiments, a nanoparticle may be characterized by a longest dimension (e.g., a diameter) of less than 300 nm. In some embodiments, a nanoparticle may be characterized by a longest dimension (e.g., a diameter) of less than 100 nm. In many embodiments, a nanoparticle may be characterized by a longest dimension between about 1 nm and about 100 nm, or between about 1 μm and about 500 nm, or between about 1 nm and 1,000 nm. In many embodiments, a population of nanoparticles is characterized by an average size (e.g., longest dimension) that is below about 1,000 nm, about 500 nm, about 100 nm, about 50 nm, about 40 nm, about 30 nm, about 20 nm, or about 10 nm and often above about 1 nm. In many embodiments, a nanoparticle may be substantially spherical so that its longest dimension may be its diameter. In some embodiments, a nanoparticle has a diameter of less than 100 nm as defined by the National Institutes of Health. Page 34 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0226] Naturally occurring: The term “naturally occurring” as used herein refers to an entity that can be found in nature. For example, a peptide or nucleic acid that is present in an organism (including viruses) and can be isolated from a source in nature and which has not been intentionally modified by man in the laboratory is naturally occurring.

[0227] Neutralization: As used herein, the term “neutralization” refers to an event in which binding agents such as antibodies bind to a biological active site of a virus such as a receptor binding protein, thereby inhibiting the parasitic infection of cells. In some embodiments, the term “neutralization” refers to an event in which binding agents eliminate or significantly reduce ability of infecting cells.

[0228] Nucleic acid particle: A “nucleic acid particle” can be used to deliver nucleic acid to a target site of interest (e.g., cell, tissue, organ, and the like). A nucleic acid particle may comprise at least one cationic or cationically ionizable lipid or lipid-like material, at least one cationic polymer such as protamine, or a mixture thereof and nucleic acid. In some embodiments, a nucleic acid particle is a lipid nanoparticle. In some embodiments, a nucleic acid particle is a lipoplex particle.

[0229] Nucleic acid / Polynucleotide: As used herein, the term “nucleic acid” refers to a polymer of at least 10 nucleotides or more. In some embodiments, a nucleic acid is or comprises DNA. In some embodiments, a nucleic acid is or comprises RNA. In some embodiments, a nucleic acid is or comprises peptide nucleic acid (PNA). In some embodiments, a nucleic acid is or comprises a single stranded nucleic acid. In some embodiments, a nucleic acid is or comprises a double-stranded nucleic acid. In some embodiments, a nucleic acid comprises both single and double-stranded fragments. In some embodiments, a nucleic acid comprises a backbone that comprises one or more phosphodiester linkages. In some embodiments, a nucleic acid comprises a backbone that comprises both phosphodiester and non-phosphodiester linkages. For example, in some embodiments, a nucleic acid may comprise a backbone that comprises one or more phosphorothioate or 5'-N-phosphoramidite linkages and / or one or more peptide bonds, e.g., as in a “peptide nucleic acid”. In some embodiments, a nucleic acid comprises one or more, or all, natural residues (e.g., adenine, cytosine, deoxyadenosine, deoxycytidine, deoxyguanosine, deoxythymidine, guanine, thymine, uracil). In some embodiments, a nucleic acid comprises on or more, or all, non-natural residues. In some embodiments, a non-natural residue comprises a nucleoside analog (e.g., 2-aminoadenosine, 2- thiothymidine, inosine, pyrrolo-pyrimidine, 3 -methyl adenosine, 5-methylcytidine, C-5 propynyl-cytidine, C-5 propynyl-uridine, 2-aminoadenosine, C5-bromouridine, C5-fluorouridine, C5-iodouridine, C5-propynyl-uridine, C5 - propynyl-cytidine, C5-methylcytidine, 2-aminoadenosine, 7-deazaadenosine, 7-deazaguanosine, 8-oxoadenosine, 8- oxoguanosine, 6-O-methylguanine, 2-thiocytidine, methylated bases, intercalated bases, and combinations thereof). In some embodiments, a non-natural residue comprises one or more modified sugars (e.g., 2'-fluororibose, ribose, 2'-deoxyribose, arabinose, and hexose) as compared to those in natural residues. In some embodiments, a nucleic acid has a nucleotide sequence that encodes a functional gene product such as an RNA or polypeptide. In some embodiments, a nucleic acid has a nucleotide sequence that comprises one or more introns. In some embodiments, a nucleic acid may be prepared by isolation from a natural source, enzymatic synthesis (e.g., by polymerization based on a complementary template, e.g., in vivo or in vitro, reproduction in a recombinant cell or system, or chemical synthesis. In some embodiments, a nucleic acid is at least 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 225, 250, 275, 300, 325, 350, Page 35 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 375, 400, 425, 450, 475, 500, 600, 700, 800, 900, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000, 7500, 8000, 8500, 9000, 9500, 10,000, 10,500, 11,000, 11,500, 12,000, 12,500, 13,000, 13,500, 14,000, 14,500, 15,000, 15,500, 16,000, 16,500, 17,000, 17,500, 18,000, 18,500, 19,000, 19,500, or 20,000 or more residues or nucleotides long.

[0230] Nucleotide: As used herein, the term “nucleotide” refers to its art-recognized meaning. When a number of nucleotides is used as an indication of size, e.g., of a polynucleotide, a certain number of nucleotides refers to the number of nucleotides on a single strand, e.g., of a polynucleotide.

[0231] Patient: As used herein, the term “patient” refers to any organism who is suffering or at risk of a disease or disorder or condition. Typical patients include animals (e.g., mammals such as mice, rats, rabbits, non- human primates, and / or humans). In some embodiments, a patient is a human. In some embodiments, a patient is suffering from or susceptible to one or more diseases or disorders or conditions. In some embodiments, a patient displays one or more symptoms of a disease or disorder or condition. In some embodiments, a patient has been diagnosed with one or more diseases or disorders or conditions. In some embodiments, a disease or disorder or condition that is amenable to provided technologies is or includes an HSV infection. In some embodiments, a patient is receiving or has received certain therapy to diagnose and / or to treat a disease, disorder, or condition. In some embodiments, a patient is a patient suffering from or susceptible to an HSV infection.

[0232] PEG-conjugated lipid: The term “PEG-conjugated lipid" refers to a molecule comprising a lipid portion and a polyethylene glycol portion.

[0233] Pharmaceutical composition: As used herein, the term “pharmaceutical composition” refers to an active agent, formulated together with one or more pharmaceutically acceptable carriers. In some embodiments, active agent is present in unit dose amount appropriate for administration in a therapeutic regimen that shows a statistically significant probability of achieving a predetermined therapeutic effect when administered to a relevant population. In some embodiments, pharmaceutical compositions may be specially formulated for parenteral administration, for example, by subcutaneous, intramuscular, or intravenous injection as, for example, a sterile solution or suspension formulation.

[0234] Pharmaceutically effective amount: The term “pharmaceutically effective amount” or “therapeutically effective amount” refers to the amount which achieves a desired reaction or a desired effect alone or together with further doses. In the case of the treatment of a particular disease, a desired reaction in some embodiments relates to inhibition of the course of the disease. In some embodiments, such inhibition may comprise slowing down the progress of a disease and / or interrupting or reversing the progress of the disease. In some embodiments, a desired reaction in a treatment of a disease may be or comprise delay or prevention of the onset of a disease or a condition. An effective amount of pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) provided herein will depend, for example, on a disease or condition to be treated, the severity of such a disease or condition, individual parameters of the patient, including, e.g., age, physiological condition, size and weight, the duration of treatment, the type of an accompanying therapy (if present), the specific route of administration and similar factors. Accordingly, doses of pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) provided herein may depend on various of such parameters. In the case that a reaction Page 36 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) in a patient is insufficient with an initial dose, higher doses (or effectively higher doses achieved by a different, more localized route of administration) may be used.

[0235] Poly(A) sequence: As used herein, the term “poly(A) sequence” or “poly-A tail” refers to an uninterrupted or interrupted sequence of adenylate residues which is typically located at the 3'-end of an RNA molecule. Poly(A) sequences are known to those of skill in the art and may follow the 3’-UTR in the RNAs described herein. An uninterrupted poly(A) sequence is characterized by consecutive adenylate residues. In nature, an uninterrupted poly(A) sequence is typical. RNAs disclosed herein can have a poly(A) sequence attached to the free 3'-end of the RNA by a template-independent RNA polymerase after transcription or a poly(A) sequence encoded by DNA and transcribed by a template-dependent RNA polymerase.

[0236] Polypeptide: As used herein, the term “polypeptide” refers to a polymeric chain of amino acids. In some embodiments, a polypeptide has an amino acid sequence that occurs in nature. In some embodiments, a polypeptide has an amino acid sequence that does not occur in nature. In some embodiments, a polypeptide has an amino acid sequence that is engineered in that it is designed and / or produced through action of the hand of man. In some embodiments, a polypeptide may comprise or consist of natural amino acids, non-natural amino acids, or both. In some embodiments, a polypeptide may comprise or consist of only natural amino acids or only non-natural amino acids. In some embodiments, a polypeptide may comprise D-amino acids, L-amino acids, or both. In some embodiments, a polypeptide may comprise only D-amino acids. In some embodiments, a polypeptide may comprise only L-amino acids. In some embodiments, a polypeptide may include one or more pendant groups or other modifications, e.g., modifying or attached to one or more amino acid side chains, at the polypeptide’s N-terminus, at the polypeptide’s C-terminus, or any combination thereof. In some embodiments, such pendant groups or modifications comprise acetylation, amidation, lipidation, methylation, pegylation, etc., including combinations thereof. In some embodiments, a polypeptide may be cyclic, and / or may comprise a cyclic portion. In some embodiments, a polypeptide is not cyclic and / or does not comprise any cyclic portion. In some embodiments, a polypeptide is linear. In some embodiments, a polypeptide may be or comprise a stapled polypeptide. In some embodiments, the term “polypeptide” may be appended to a name of a reference polypeptide, activity, or structure; in such instances it is used herein to refer to polypeptides that share the relevant activity or structure and thus can be considered to be members of the same class or family of polypeptides. For each such class, the present specification provides and / or those skilled in the art will be aware of exemplary polypeptides within the class whose amino acid sequences and / or functions are known; in some embodiments, such exemplary polypeptides are reference polypeptides for the polypeptide class or family. In some embodiments, a member of a polypeptide class or family shows significant sequence homology or identity with, shares a common sequence motif (e.g., a characteristic sequence element) with, and / or shares a common activity (in some embodiments at a comparable level or within a designated range) with a reference polypeptide of the class; in some embodiments with all polypeptides within the class). For example, in some embodiments, a member polypeptide shows an overall degree of sequence homology or identity with a reference polypeptide that is at least about 30-40%, and is often greater than about 50%, 60%, 70%, 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more and / or includes at least one region (e.g., a conserved region that may in some embodiments be or comprise a characteristic sequence element) that shows very high sequence identity, often greater than 90% or even 95%, 96%, 97%, 98%, or 99%. Such a conserved region usually encompasses at least 3-4 and often up to 20 or more amino acids; in some embodiments, a conserved region Page 37 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) encompasses at least one stretch of at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or more contiguous amino acids. In some embodiments, a relevant polypeptide may comprise or consist of a fragment of a parent polypeptide.

[0237] Prevent: As used herein, the term “prevent” or “prevention” when used in connection with the occurrence of a disease, disorder, and / or condition, refers to reducing the risk of developing the disease, disorder and / or condition and / or to delaying onset of one or more characteristics or symptoms of the disease, disorder or condition. Prevention may be considered complete when onset of a disease, disorder or condition has been delayed for a predefined period of time.

[0238] Recombinant: The term “recombinant” in the context of the present disclosure means “made through genetic engineering”. In some embodiments, a “recombinant” entity such as a recombinant nucleic acid in the context of the present disclosure is not naturally occurring.

[0239] Reference: As used herein, the term “reference” describes a standard or control relative to which a comparison is performed. For example, in some embodiments, an agent, animal, individual, population, sample, sequence or value of interest is compared with a reference or control agent, animal, individual, population, sample, sequence or value. In some embodiments, a reference or control is tested and / or determined substantially simultaneously with the testing or determination of interest. In some embodiments, a reference or control is a historical reference or control, optionally embodied in a tangible medium. Typically, as would be understood by those skilled in the art, a reference or control is determined or characterized under comparable conditions or circumstances to those under assessment. Those skilled in the art will appreciate when sufficient similarities are present to justify reliance on and / or comparison to a particular possible reference or control.

[0240] Ribonucleic acid (RNA): As used herein, the term “RNA” refers to a polymer of ribonucleotides. In some In some embodiments, an RNA is double stranded. In someembodiments, and double stranded fragments. In some embodiments, an RNA can comprise a backbone structure as described in the definition of “Nucleic acid / Polynucleotide” above. An RNA can be a regulatory RNA (e.g., siRNA, microRNA, etc.), or a messenger RNA (mRNA). In some embodiments where an RNA is a mRNA. In some embodiments where an RNA is a mRNA, an RNA typically comprises at its 3’ end a poly(A) region. In some embodiments where an RNA is a mRNA, an RNA typically comprises at its 5’ end an art-recognized cap structure, e.g., for recognizing and attachment of an RNA to a ribosome to initiate translation. In some embodiments, an RNA is a synthetic RNA. Synthetic RNAs include RNAs that are synthesized in vitro (e.g., by enzymatic synthesis methods and / or by chemical synthesis methods).

[0241] Ribonucleotide: As used herein, the term “ribonucleotide” encompasses unmodified ribonucleotides and modified ribonucleotides. For example, unmodified ribonucleotides include the purine bases adenine (A) and guanine (G), and the pyrimidine bases cytosine (C) and uracil (U). Modified ribonucleotides may include one or more modifications including, but not limited to, for example, (a) end modifications, e.g., 5' end modifications (e.g., phosphorylation, dephosphorylation, conjugation, inverted linkages, etc.), 3' end modifications (e.g., conjugation, inverted linkages, etc.), (b) base modifications, e.g. , replacement with modified bases, stabilizing bases, destabilizing bases, or bases that base pair with an expanded repertoire of partners, or conjugated bases, (c) sugar modifications (e.g., at the 2' position or 4' position) or replacement of the sugar, and (d) internucleoside linkage modifications, including modification or replacement of the phosphodiester linkages. The term Page 38 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) “ribonucleotide” also encompasses ribonucleotide triphosphates including modified and non-modified ribonucleotide triphosphates.

[0242] Risk: As will be understood from context, “risk” of a disease, disorder, and / or condition refers to a likelihood that a particular individual will develop the disease, disorder, and / or condition. In some embodiments, risk is expressed as a percentage. In some embodiments, risk is from 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90 up to 100%. In some embodiments risk is expressed as a risk relative to a risk associated with a reference sample or group of reference samples. In some embodiments, a reference sample or group of reference samples have a known risk of a disease, disorder, condition and / or event. In some embodiments a reference sample or group of reference samples are from individuals comparable to a particular individual. In some embodiments, relative risk is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more. In some embodiments, risk may reflect one or more genetic attributes, e.g., which may predispose an individual toward development (or not) of a particular disease, disorder and / or condition. In some embodiments, risk may reflect one or more epigenetic events or attributes and / or one or more lifestyle or environmental events or attributes.

[0243] RNA lipoplex particle: As used herein, the term “RNA lipoplex particle” refers to a complex comprising liposomes, in particular cationic liposomes, and RNA molecules. Without wishing to bound by a particular theory, electrostatic interactions between positively charged liposomes and negatively charged RNA results in complexation and spontaneous formation of RNA lipoplex particles. In some embodiments, positively charged liposomes may comprise a cationic lipid, such as in some embodiments DOTMA, and additional lipids, such as in some embodiments DOPE. In one embodiment, an RNA lipoplex particle is a nanoparticle.

[0244] Selective or specific: The term “selective” or “specific”, when used herein in reference to an agent having an activity, is understood by those skilled in the art to mean that the agent discriminates between potential target entities, states, or cells. For example, in some embodiments, an agent is said to bind “specifically” to its target if it binds preferentially with that target in the presence of one or more competing alternative targets. In many embodiments, specific interaction is dependent upon the presence of a particular structural feature of the target entity (e.g., an epitope, a cleft, a binding site). It is to be understood that specificity need not be absolute. In some embodiments, specificity may be evaluated relative to that of a target-binding moiety for one or more other potential target entities (e.g., competitors). In some embodiments, specificity is evaluated relative to that of a reference specific binding moiety. In some embodiments, specificity is evaluated relative to that of a reference non- specific binding moiety.

[0245] Stable: As used herein, the term “stable” in the context of the present disclosure refers to a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) as a whole and / or components thereof meeting or exceeding pre-determined acceptance criteria. For example, in some embodiments, a stable pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) exhibits no unacceptable levels of microbial growth, and substantially no or no breakdown or degradation of the active biological molecule component(s). In some embodiments, a stable pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) refers to the integrity of RNA molecules being maintained at least above 90% or more. In some embodiments, a stable pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) refers to at least 90% or more (including, e.g., at least 95%, at least 96%, at least 97%, or more) of RNA molecules being maintained Page 39 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) to be encapsulated within lipid nanoparticles. In some embodiments, a stable pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) refers to a formulation that remains capable of eliciting a desired immunologic response when administered to a subject. In some embodiments, a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) remains stable for a specified period of time under certain conditions.

[0246] Subject: As used herein, the term “subject” refers to an organism to be administered with a composition described herein, e.g., for experimental, diagnostic, prophylactic, and / or therapeutic purposes. Typical subjects include animals (e.g., mammals such as mice, rats, rabbits, non-human primates, domestic pets, etc.) and humans. In some embodiments, a subject is a human subject. In some embodiments, a subject is suffering from a disease, disorder, or condition (e.g., an HSV infection). In some embodiments, a subject is susceptible to a disease, disorder, or condition (e.g., an HSV infection). In some embodiments, a subject displays one or more symptoms or characteristics of a disease, disorder, or condition (e.g., an HSV infection). In some embodiments, a subject displays one or more non-specific symptoms of a disease, disorder, or condition (e.g., an HSV infection). In some embodiments, a subject does not display any symptom or characteristic of a disease, disorder, or condition (e.g., an HSV infection). In some embodiments, a subject is someone with one or more features characteristic of susceptibility to or risk of a disease, disorder, or condition (e.g., an HSV infection). In some embodiments, a subject is a patient. In some embodiments, a subject is an individual to whom diagnosis and / or therapy is and / or has been administered.

[0247] Suffering from: An individual who is “suffering from” a disease, disorder, and / or condition has been diagnosed with and / or displays one or more symptoms of a disease, disorder, and / or condition.

[0248] Susceptible to: An individual who is “susceptible to” a disease, disorder, and / or condition is one who has a higher risk of developing the disease, disorder, and / or condition than does a member of the general public. In some embodiments, an individual who is susceptible to a disease, disorder and / or condition may not have been diagnosed with the disease, disorder, and / or condition. In some embodiments, an individual who is susceptible to a disease, disorder, and / or condition may exhibit symptoms of the disease, disorder, and / or condition. In some embodiments, an individual who is susceptible to a disease, disorder, and / or condition may not exhibit symptoms of the disease, disorder, and / or condition. In some embodiments, an individual who is susceptible to a disease, disorder, and / or condition will develop the disease, disorder, and / or condition. In some embodiments, an individual who is susceptible to a disease, disorder, and / or condition will not develop the disease, disorder, and / or condition.

[0249] Synthetic: As used herein, the term “synthetic” refers to an entity that is artificial, or that is made with human intervention, or that results from synthesis rather than naturally occurring. For example, in some embodiments, a synthetic nucleic acid or polynucleotide refers to a nucleic acid molecule that is chemically synthesized, e.g., in some embodiments by solid-phase synthesis. In some embodiments, the term “synthetic” refers to an entity that is made outside of biological cells. For example, in some embodiments, a synthetic nucleic acid or polynucleotide refers to a nucleic acid molecule (e.g., an RNA) that is produced by in vitro transcription using a template.

[0250] Therapy: The term “therapy” refers to an administration or delivery of an agent or intervention that has a therapeutic effect and / or elicits a desired biological and / or pharmacological effect (e.g., has been demonstrated to be statistically likely to have such effect when administered to a relevant population). In some embodiments, a therapeutic agent or therapy is any substance that can be used to alleviate, ameliorate, relieve, Page 40 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) inhibit, prevent, delay onset of, reduce severity of, and / or reduce incidence of one or more symptoms or features of a disease, disorder, and / or condition. In some embodiments, a therapeutic agent or therapy is a medical intervention (e.g., surgery, radiation, phototherapy) that can be performed to alleviate, relieve, inhibit, present, delay onset of, reduce severity of, and / or reduce incidence of one or more symptoms or features of a disease, disorder, and / or condition.

[0251] Three prime untranslated region: As used herein, the terms “three prime untranslated region” or “3' UTR” refer to a sequence of an RNA molecule that begins following a stop codon of a coding region of an open reading frame sequence. In some embodiments, the 3' UTR begins immediately after a stop codon of a coding region of an open reading frame sequence, e.g., in its natural context. In other embodiments, the 3' UTR does not begin immediately after stop codon of the coding region of an open reading frame sequence, e.g., in its natural context.

[0252] Threshold level (e.g., acceptance criteria): As used herein, the term “threshold level” refers to a level that are used as a reference to attain information on and / or classify the results of a measurement, for example, the results of a measurement attained in an assay. For example, in some embodiments, a threshold level means a value measured in an assay that defines the dividing line between two subsets of a population (e.g., a batch that satisfy quality control criteria vs. a batch that does not satisfy quality control criteria). Thus, a value that is equal to or higher than the threshold level defines one subset of the population, and a value that is lower than the threshold level defines the other subset of the population. A threshold level can be determined based on one or more control samples or across a population of control samples. A threshold level can be determined prior to, concurrently with, or after the measurement of interest is taken. In some embodiments, a threshold level can be a range of values.

[0253] Treat: As used herein, the term “treat,” “treatment,” or “treating” refers to any method used to partially or completely alleviate, ameliorate, relieve, inhibit, prevent, delay onset of, reduce severity of, and / or reduce incidence of one or more symptoms or features of a disease, disorder, and / or condition. Treatment may be administered to a subject who does not exhibit signs of a disease, disorder, and / or condition. In some embodiments, treatment may be administered to a subject who exhibits only early signs of the disease, disorder, and / or condition, for example for the purpose of decreasing the risk of developing pathology associated with the disease, disorder, and / or condition. In some embodiments, treatment may be administered to a subject at a later-stage of disease, disorder, and / or condition.

[0254] Vaccination: As used herein, the term “vaccination” refers to the administration of a composition intended to generate an immune response, for example to a disease-associated (e.g., disease-causing) agent. In some embodiments, vaccination can be administered before, during, and / or after exposure to a disease-associated agent, and in certain embodiments, before, during, and / or shortly after exposure to the agent. In some embodiments, vaccination includes multiple administrations, appropriately spaced in time, of a vaccine composition. In some embodiments, vaccination generates an immune response to an infectious agent.

[0255] Vaccine: As used herein, the term “vaccine” refers to a composition that induces an immune response upon administration to a subject. In some embodiments, an induced immune response provides protective immunity. Page 41 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0256] Variant: As used herein in the context of molecules, e.g., nucleic acids, proteins, or small molecules, the term “variant” refers to a molecule that shows significant structural identity with a reference molecule but differs structurally from the reference molecule, e.g., in the presence or absence or in the level of one or more chemical moieties as compared to the reference entity. In some embodiments, a variant also differs functionally from its reference molecule. In general, whether a particular molecule is properly considered to be a “variant” of a reference molecule is based on its degree of structural identity with the reference molecule. As will be appreciated by those skilled in the art, any biological or chemical reference molecule has certain characteristic structural elements. A variant, by definition, is a distinct molecule that shares one or more such characteristic structural elements but differs in at least one aspect from the reference molecule. In some embodiments, a variant polypeptide or nucleic acid may differ from a reference polypeptide or nucleic acid as a result of one or more differences in amino acid or nucleotide sequence and / or one or more differences in chemical moieties (e.g., carbohydrates, lipids, phosphate groups) that are covalently components of the polypeptide or nucleic acid (e.g., that are attached to the polypeptide or nucleic acid backbone). In some embodiments, a variant polypeptide or nucleic acid shows an overall sequence identity with a reference polypeptide or nucleic acid that is at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, or 99%. In some embodiments, a variant polypeptide or nucleic acid does not share at least one characteristic sequence element with a reference polypeptide or nucleic acid. In some embodiments, a reference polypeptide or nucleic acid has one or more biological activities. In some embodiments, a variant polypeptide or nucleic acid shares one or more of the biological activities of the reference polypeptide or nucleic acid. In some embodiments, a variant polypeptide or nucleic acid lacks one or more of the biological activities of the reference polypeptide or nucleic acid. In some embodiments, a variant polypeptide or nucleic acid shows a reduced level of one or more biological activities as compared to the reference polypeptide or nucleic acid. In some embodiments, a polypeptide or nucleic acid of interest is considered to be a “variant” of a reference polypeptide or nucleic acid if it has an amino acid or nucleotide sequence that is identical to that of the reference but for a small number of sequence alterations at particular positions. Typically, fewer than about 20%, about 15%, about 10%, about 9%, about 8%, about 7%, about 6%, about 5%, about 4%, about 3%, or about 2% of the residues in a variant are substituted, inserted, or deleted, as compared to the reference. In some embodiments, a variant polypeptide or nucleic acid comprises about 10, about 9, about 8, about 7, about 6, about 5, about 4, about 3, about 2, or about 1 substituted residue(s) as compared to a reference. Often, a variant polypeptide or nucleic acid comprises a very small number (e.g., fewer than about 5, about 4, about 3, about 2, or about 1) number of substituted, inserted, or deleted, functional residues (i.e., residues that participate in a particular biological activity) relative to the reference. In some embodiments, a variant polypeptide or nucleic acid comprises not more than about 5, about 4, about 3, about 2, or about 1 addition or deletion, and, in some embodiments, comprises no additions or deletions, as compared to the reference. In some embodiments, a variant polypeptide or nucleic acid comprises fewer than about 25, about 20, about 19, about 18, about 17, about 16, about 15, about 14, about 13, about 10, about 9, about 8, about 7, about 6, and commonly fewer than about 5, about 4, about 3, or about 2 additions or deletions as compared to the reference. In some embodiments, a reference polypeptide or nucleic acid is one found in nature.

[0257] Vector: as used herein, refers to a nucleic acid molecule capable of transporting another nucleic acid to which it has been linked. One type of vector is a “plasmid”, which refers to a circular double stranded DNA loop into which additional DNA segments may be ligated. Another type of vector is a viral vector, wherein additional Page 42 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) DNA segments may be ligated into the viral genome. Certain vectors are capable of autonomous replication in a host cell into which they are introduced (e.g., bacterial vectors having a bacterial origin of replication and episomal mammalian vectors). Other vectors (e.g., non-episomal mammalian vectors) can be integrated into the genome of a host cell upon introduction into the host cell, and thereby are replicated along with the host genome. Moreover, certain vectors are capable of directing the expression of genes to which they are operatively linked. Such vectors are referred to herein as “expression vectors.” In some embodiments, known techniques may be used, for example, for generation or manipulation of recombinant DNA, for oligonucleotide synthesis, and for tissue culture and transformation (e.g., electroporation, lipofection). Enzymatic reactions and purification techniques may be performed according to manufacturer's specifications or as commonly accomplished in the art or as described herein. The foregoing techniques and procedures may be generally performed according to conventional methods well known in the art and as described in various general and more specific references that are cited and discussed throughout the present specification. See e.g., Sambrook et al., Molecular Cloning: A Laboratory Manual (4th ed., Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y. (2012)), which is incorporated herein by reference for any purpose.

[0258] All literature and similar material cited in this application, including, but not limited to, patents, patent applications, articles, books, treatises, and web pages, regardless of the format of such literature and similar materials, are expressly incorporated by reference in their entirety. In the event that one or more of the incorporated literature and similar materials differs from or contradicts this application, including but not limited to defined terms, term usage, described techniques, or the like, this application controls. The section headings used herein are for organizational purposes only and are not to be construed as limiting the subject matter described in any way. DETAILED DESCRIPTION OF CERTAIN EMBODIMENTS

[0259] As discussed above, the present disclosure provides pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) for delivering particular herpes simplex virus (HSV) antigen constructs (e.g., HSV-1 antigen constructs, HSV-2 antigen constructs, or a combination thereof) to a subject (e.g., a patient) and related technologies (e.g., methods). In particular, the present disclosure provides HSV (e.g., HSV-1, HSV-2, or both) compositions (e.g., immunogenic compositions, e.g., vaccines) and related technologies (e.g., methods).

[0260] The present disclosure provides for example, polyribonucleotides that encode one or more HSV antigens. In some embodiments, such a polyribonucleotide can be part of an RNA construct. In some embodiments, a polyribonucleotide or RNA construct as provided herein can be part of a composition (e.g., a pharmaceutical composition, e.g., an immunogenic composition, e.g., a vaccine.

[0261] In some embodiments, technologies provided herein are directed against HSV. A description of HSV and certain exemplary features is described below. I. Herpes Simplex Virus (HSV)

[0262] Herpes simplex virus (HSV) belongs to the alpha subfamily of the human herpesvirus family and includes HSV-1 and HSV-2. The structure of HSV-1 and HSV-2 mainly include (from inside to outside) a DNA core, capsid, tegument and envelope. Each of HSV-1 and HSV-2 have a double stranded DNA genome of about 153kb, encoding at least 80 genes. The DNA core is enclosed by an icosapentahedral capsid composed of 162 capsomeres, Page 43 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 150 hexons and 12 pentons, made of six different viral proteins. The DNA is surrounded by at least 20 different viral tegument proteins that have structural and regulatory roles. Some of them participating in capsid transport to the nucleus and other organelles, viral DNA entry into the nucleus, activation of early genes transcription, suppression of cellular protein biosynthesis, and RNA degradation. The viral envelope surrounding the tegument has at least 12 different glycoproteins (B-N) on their surface. The glycoproteins may exist as heterodimers (H / L and E / I) with most existing as monomers.

[0263] HSV-1 and HSV-2 are responsible for a number of minor, moderate and severe pathologies, including oral and genital ulceration, virally induced blindness, viral encephalitis and disseminated infection of neonates. HSV-1 and HSV-2 are usually transmitted by different routes and affect different areas of the body, but the signs and symptoms that they cause can overlap. Infections caused by HSV-1 represent one of the more widespread infections of the orofacial region and commonly causes herpes labialis, herpetic stomatitis, and keratitis. HSV-2 typically causes genital herpes and is transmitted primarily by direct sexual contact with lesions. Most genital HSV infections are caused by HSV-2, however, an increasing number of genital HSV infections have been attributed to HSV-1. Genital HSV-1 infections are typically less severe and less prone to occurrence than genital HSV-2 infections.

[0264] HSV infections are transmitted through contact with herpetic lesions, mucosal surfaces, genital secretions, or oral secretions. The average incubation period after exposure is typically 4 days but may range between 2 and 12 days. HSV particles can infect neuronal prolongations enervating peripheral tissues and establish latency in these cells, namely in the trigeminal ganglia and dorsal root ganglia of the sacral area from where they can sporadically reactivate. Additionally, similar to other herpesviruses, HSV infections are lifelong and generally asymptomatic. Without wishing to be bound by any particular theory, it is understood that HSV particles can be shed from infected individuals independent of the occurrence of clinical manifestations.

[0265] HSV infections are rarely fatal but are characterized by blisters that can rupture and become painful. There are few clear differences in clinical presentation based on the type of infecting virus. However, as discussed above, HSV-1 infections tend to be less severe than HSV-2 infections, and patients infected with HSV-2 generally have more outbreaks. A. Lifecycle

[0266] As described herein, to initiate infection, an HSV (HSV-1 or HSV-2) particle binds to the cell surface using the viral glycoproteins and fuses its envelope with the plasma membrane (see, e.g., FIG.2, Step 1). After the fusion of membranes, the viral capsid and tegument proteins are internalized in the cytoplasm (see, e.g., FIG.2, Step 2). Once in the cytoplasm, the viral capsid accumulates in the nucleus and releases viral DNA into the nucleus (see, e.g., FIG.2, Step 3). HSV replicates by three rounds of transcription that yield: α (immediate early) proteins that mainly regulate viral replication; β (early) proteins that synthesize and package DNA; and γ (late) proteins, most of which are virion proteins (see, Whitley et.al., Lancet 2001 May 12;357(9267); Taylor et.al., Front Biosci. 2002 Mar 1;7:d752-64; and Ibáñez et.al., Front Microbiol. 2018 Oct 11;9:2406; each of which is incorporated herein by reference in its entirety) (see, e.g., FIG.2, Steps 4-6).

[0267] The HSV capsids are assembled within the nucleus of infected cells (see, e.g., FIG.2, Step 7). Once the assembly of viral capsids has been completed in the nucleus, these particles will continue their maturation Page 44 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) process in this same compartment through the acquisition of tegument proteins. After leaving the nucleus, additional tegument proteins will be added to the capsids. Meanwhile, the glycoproteins are translated and glycosylated in the endoplasmic reticulum and processed in the trans-Golgi network (TGN) and then directed to multivesicular bodies (see, e.g., FIG.2, Step 8). Then, they are exported to the plasma membrane glycoproteins within early endosomes (see, e.g., FIG.2, Step 9). Viral capsids in the cytoplasm will then fuse with HSV-glycoprotein-containing endosomes to form infectious virions within vesicles (see, e.g., FIG.2, Steps 10-12).

[0268] HSV (HSV-1 or HSV-2) are able to establish a latent infection. After primary infection, HSV either replicates productively in epithelial cells or enters sensory neuron axons and moves to the neuronal cell nucleus. There, the viral DNA remains as circular, extra-chromosomal DNA, and does not possess any lytic gene expression; however, latency associated transcripts are expressed and then spliced to produce RNA. This general transcriptional silence may allow the virus to remain hidden in the cell by avoiding immune surveillance. In someembodiments, provided herein are technologies (e.g., compositions and methods) for augmenting, inducing, promoting, enhancing and / or improving an immune response against HSV (e.g., HSV-1 and / or HSV-2) or a component thereof (e.g., a protein or fragment thereof). In some embodiments, technologies provided herein are designed to augment, induce, promote, enhance and / or improve immunological memory against HSV or a component thereof (e.g., a protein or fragment thereof). In some embodiments, technologies provided herein are designed to act as an immunological boost to a primary composition (e.g., an immunogenic composition, a vaccine), such as a composition (e.g., an immunogenic composition, a vaccine) directed to antigens and / or epitopes of HSV (e.g., HSV-1 and / or HSV-2).

[0269] The virus remains in this state for the lifetime of the host, or until the proper signals reactivate the virus and new progeny are generated. Progeny virus then travel through the neuron axis to the site of the primary infection to re-initiate a lytic replication cycle. B. HSV Genome

[0270] The genome of HSV-1 and the genome of HSV-2 are both approximately 150 kb long of double- stranded DNA, varying slightly between subtypes and strains. The genome encodes more than 80 genes and has high GC contents: 67 and 69% for HSV-1 and HSV-2, respectively (see, Whitley et.al., Lancet 2001 May 12;357(9267); Taylor et.al., Front Biosci. 2002 Mar 1;7:d752-64; and Jiao et.al., Microbiol Resour Announc. 2019 Sep; 8(39): e00993-19, which is incorporated herein by reference in its entirety).

[0271] The genome is organized as unique long region (UL) and a unique short region (US). The UL is typically bounded by terminal long (TRL) and internal long (IRL) repeats. The US is typically bounded by terminal short (IRS) and internal short (TRS) repeats. The genes found in the unique regions are present in the genome as a single copy, but genes that are encoded in the repeat regions are present in the genome in two copies (see, Whitley et.al., Lancet 2001 May 12;357(9267); Taylor et.al., Front Biosci. 2002 Mar 1;7:d752-64; and Jiao et.al., Microbiol Resour Announc. 2019 Sep; 8(39): e00993-19, each of which is incorporated herein by reference in its entirety).

[0272] HSV contains three origins of replication within the genome that are named depending upon their location in either the Long (oriL) or Short (oriS) region of the genome. OriL is found as a single copy in the UL segment, but oriS is located in the repeat region of the Short segment; thus, it is present in the genome in two copies. Both oriL and oriS are palindromic sequences consisting of an AT-rich center region flanked by inverted Page 45 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) repeats that contain multiple binding sites of varying affinity for the viral origin binding polypeptide (UL9). Either oriL or one of the oriS sequences is sufficient for viral replication (see, Whitley et.al., Lancet 2001 May 12;357(9267); Taylor et.al., Front Biosci. 2002 Mar 1;7:d752-64; and Jiao et.al., Microbiol Resour Announc. 2019 Sep; 8(39): e00993-19, each of which is incorporated herein by reference in its entirety).

[0273] The viral genome also contains signals that orchestrate proper processing of the newly synthesized genomes for packaging into pre-formed capsids. Progeny genomes are generated in long concatemers that require cleavage into unit-length monomers. For this purpose, the viral genome contains two DNA sequence elements, pac1 and pac2, that ensure proper cleavage and packaging of unit-length progeny genomes. These elements are located within the direct repeats (DR) found within the inverted repeat regions at the ends of the viral genome (see, Whitley et.al., Lancet 2001 May 12;357(9267); Taylor et.al., Front Biosci. 2002 Mar 1;7:d752-64; and Jiao et.al., Microbiol Resour Announc. 2019 Sep; 8(39): e00993-19, each of which is incorporated herein by reference in its entirety). C. Certain HSV Proteins 1. ICP0

[0274] Infected cell protein 0 (ICP0) of herpes simplex virus 1 (HSV-1) is an α (immediate-early) protein of herpes simplex virus 1 and is capable of activating HSV-1 gene expression, disrupt nuclear domain (ND) 10 structures, mediate the degradation of cellular proteins, and evade the host cell’s intrinsic and innate antiviral defenses (see., Smith et.al., Future Virol. 2011 Apr; 6(4): 421–429, which is incorporated herein by reference in its entirety). 2. ICP22

[0275] Infected cell protein 22 (ICP22) is expressed from an immediate–early (IE) gene during the replication cycle of HSV-1 and HSV-2. ICP22 can generally regulate viral and host gene transcription by changing the phosphorylation status of host RNA polymerase II (RNA pol II) and can also facilitate the nuclear egress complex (NEC) accurately locate to the nuclear membrane to promote nuclear budding (see, Wu et.al., Front Microbiol. 2021 Jun 7;12:668461, which is incorporated herein by reference in its entirety). 3. VP16

[0276] The UL48 gene encodes VP16 or alpha-gene-transactivating factor (α-TIF). VP16 is an important transactivator that can activate the transcription of viral immediate-early genes, and in the late stage of viral replication. Additionally, VP16, as a tegument, is involved in viral assembly (see Fan, et.al., Front Microbiol. 2020; 11: 1910, which is incorporated herein by reference in its entirety).

[0277] In the early stage of viral infection, VP16 released by invading virions binds to the immediate-early (IE) gene promoter to stimulate the transcription of IE genes as a transactivating factor that acts specifically on IE genes (see Fan, et.al., Front Microbiol. 2020; 11: 1910). In the late stage, VP16 assembles into the tegument to participate in the assembly of virions and promote their maturation (see Fan, et.al., Front Microbiol. 2020; 11: 1910, which is incorporated herein by reference in its entirety). Page 46 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 4. Glycoproteins

[0278] In order to replicate, enveloped HSV must be able to fuse with the membrane of a living cell and deliver their genetic material into its cytoplasm. The HSV viral envelope surrounding the tegument has at least 12 different glycoproteins (gB-gN) on their surface. The glycoproteins may exist as heterodimers (gH / gL and gE / gI) with most existing as monomers. HSV gC, gB, gD, gH, and gL are involved in the process of viral cell entry. Initial attachment is mediated by gC, followed by gD. Then gH / gL pull the virus and the cell membrane together, and then gB triggers the membrane fusion. (Reske et. al., Rev Med Virol. May-Jun 2007; and Arii et. al., Adv Exp Med Biol. 2018;1045:3-21, which is incorporated herein by reference in its entirety).

[0279] The present disclosure provides HSV glycoprotein (e.g., gB, gC, gD, gE, gG, gH, gI, and / or gL) antigens and antigenic fragments thereof can be useful in preventing or treating HSV, e.g., in HSV antigen constructs and / or HSV compositions (e.g., immunogenic compositions, e.g., vaccines) as further disclosed herein. 5. Glycoprotein C (gC)

[0280] Mature HSV glycoprotein C (gC) is a 56 kDa protein that plays a role in initial cell attachment. Glycoprotein C is a type I membrane glycoprotein and is considered a significant attachment protein and principle viral ligand for binding heparin sulfate proteoglycans (HSPGs) on a cell surface. Binding can occur by gC interaction with HSPG rich regions found on F-actin rich membrane protrusions referred to as filopodia.

[0281] Glycoprotein C has also been shown to be involved in regulation of cell entry and infection by increasing pH threshold for acid-induced conformational changes of gB. Low pH induces reversible conformational changes to gB domains I and V, the functional region containing hydrophobic loops important in cell fusion. By positively regulating low-pH-induced conformational changes of gB, gC can enhance HSV’s ability to invade cell types, like epithelial cells, that require a low-pH mechanism for invasion.

[0282] Glycoprotein C has also been shown to play a role in immune evasion, in addition to its role in attachment. Glycoprotein C is a target for lymphocyte cytotoxicity in certain cell types and is able to bind complement component C3b to inhibit compliment activation. Furthermore, neutralizing epitopes that exist on other HSV glycoproteins, like gB, can be protected by gC, preventing immune responses from blocking fusion. 6. Glycoprotein D (gD)

[0283] HSV glycoprotein D (gD) is a 46 kDA type I membrane glycoprotein. The N-terminal ectodomain comprises 316 amino acids. Glycoprotein D facilitates invasion by interacting with several cell surface receptors, including herpesvirus entry mediator (HVEM), nectin-1 or nectin-2, and heparin sulfate that contain specific modifications. These cellular receptors do not function as co-receptors, as each glycoprotein interaction with a cell’s receptor occurs independently of each other. Binding of gD to one of these cellular receptors causes a conformational change that converts gD’s auto-inhibitory closed state into an active state that transmits one of two signals believed to be required for gH / gL complex activation. HVEM, the first gD receptor identified, belongs to the tumor necrosis factor receptor family and is commonly found on T cells, B cells, dendritic cells, natural killer cells, macrophages, as well as non-immune cell types like neurons and epithelial cells. Within the N-terminus of gD, there is a 37-residue hairpin structure that forms the entire site for binding to HVEM. Specifically, residues 1-32 of the N-terminal domain Page 47 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) of gD binds HVEM’s cysteine-rich domain 1. When not in contact with HVEM, this N-terminal extension adopts an extended and flexible conformation.

[0284] Clinical strains of HSV use nectin-1 for cell entry; however, several mutant strains of HSV utilize nectin-2. Furthermore, heparin sulfate is utilized by HSV-1 but not HSV-2. Glycoprotein D interaction with net-1 has been shown to be essential in some cell types such as neurons, even when other receptors are present on a cell surface. 7. Glycoprotein H (gH) / Glycoprotein L (gL) Complex

[0285] Glycoprotein H (gH) is an essential 56kD protein that exists as a heterodimeric complex with 25 kDa glycoprotein L (gL) (complex referred to herein as gH / gL). The gH / gL complex is required for cell fusion and entry. gH / gL does not share any structural similarities with documented fusion proteins and likely does not function as a cofusogen with gB. Instead, gH / gL may act as a regulator of fusion and important component in stabilizing contact between HSV and a cell. Glycoprotein H receives a signal from gD through its H1 domain, and transmits this signal to membrane proximal H3 domain, which in turn propagates that signal to gH’s cytoplasmic tail. Once gH’s cytoplasmic tail receives this signal, it releases strain on the pre-fusion conformation of gB, which favors attachment of gB’s fusion loop to a cell surface, promoting gB mediated membrane fusion. Mutations in gH’s C-terminal tail have been shown to reduce fusion activity. Furthermore, antibody responses directed towards gH have been shown capable of inhibiting fusion processes mediated by gB-gH-gL. In addition to this essential role, gH contains an arginylglycylaspartic acid (RGD) motif that can bind integrin receptors found on cells. Interaction of gH with integrin is believed to trigger intracellular signals which facilitate capsid transport. 8. Glycoprotein B (gB)

[0286] Glycoprotein B is a protein that has an apparent molecular weight of approximately 95-100 kDa and consists of an extended rod or spike-like ectodomain, a hydrophobic membrane proximal region (MPR), a transmembrane region (TMR), and a C-terminal domain (CTD). The ectodomain is well characterized to actively participate in fusion, while MPR, TMR, and CTD can play roles in regulation fusion. Glycoprotein B is a class III fusogen. Glycoprotein B ectodomain architecture shares conformational similarity with fusogens from viruses not belonging to the herpesvirdae family. Glycoprotein B is activated through its interaction with gH / gL, but HSV cannot fuse with a target cell through activation of gB alone and requires gB interaction to specific receptors for fusion to be completed. A well-known receptor target of gB is cell-surface heparin sulfate, an interaction that is not essential for HSV fusion, but is known to promote viral adhesion to a cell surface. Glycoprotein B can also interact with paired immunoglobulin-like type 2 receptor, most commonly found on monocytes, macrophages, and dendritic cells.

[0287] HSV gB exists in two forms, a pre-fusion and post fusion form. Several changes in the pre-fusion form of gB are thought to lead to its active and post-fusion state. The first change occurs at domain V or at MPR, which allows fusion loops to point towards a cell membrane and away from a viral membrane. This change can produce a compacting intermediate conformation 1 that does not yet attach to a cell membrane surface. The next change occurs at domain III and involves gB adopting an extended intermediate conformation 2 that allows its fusion loop to attach to a cell membrane surface. Lastly, changes in domain V convert gB to its post-fusion conformation that favors membrane fusion. Page 48 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0288] The post-fusion form of HSV-1 gB has an ectodomain that exists as three protomers that interact to produce a rod-like trimeric structure. Each promoter is comprised of five distinct domains with linker regions that individually form a hairpin shape. Each domain of an individual protomer interacts with the same domain of an adjacent protomer to form the described trimeric structure. Domain I houses an important fusion loop and is commonly referred to as the fusion domain. Domain II facilitates interactions with gH / gL and is referred to as the gH / gL domain. Domain III is comprised of alpha helices that help form the trimeric coil-coil central core of this protein. Domain IV is referred to as the crown domain and sits on top of the post-fusion form; it is believed to bind with cellular receptors. Antibodies that bind to the crown domain can disrupt gB binding to cellular receptors. Domain V consists of a long extension and connects protomers together. 9. Glycoprotein E and glycoprotein I (gE / gI)

[0289] Glycoprotein E is approximately 53 kDa and Glycoprotein I is approximately 141 kDa. Both proteins interact to form a heterodimeric complex (complex referred to herein as gE / gI) that plays a role in cell-to-cell spread and virus induced fusion. The gE / gI complex, unlike gB, gD, and gH / gL, is not required for fusion and entrance into a cell but is important for cell-to-cell spread. Disruption of gE / gI formation has effects on HSV proliferation, as this virus relies on cell-to-cell spread for its lytic cycle. The mechanism in which gE / gI facilitate cell-to-cell spread is thought to be reliant on several tegument polypeptides. Cooperation of tegument polypeptides, UL11, UL16, and UL21 may play a role in processing, transport, and biological activity of gE. 10. Glycoprotein G

[0290] Glycoprotein G (gG) from both HSV-1 (gG1) and HSV-1 (gG2) is the first viral chemokine-binding protein shown to potentiate chemokine function of a cell. Glycoprotein G varies in size significantly between HSV-1 and HSV-2, with a 76 kDa and 43 kDa size, respectively. Glycoprotein G is unique in that its soluble form (SgG2) can have immune modulatory capacity through its extracellular activity. Once extracellular, SgG2 binds chemokines through the glycosaminoglycan (GAG)-binding domain of a chemokine without interfering with chemokine’s G protein coupled receptors (GPCRs) binding site. SgG2’s interaction with GAG containing proteins allows initiation of lipid raft formation and accumulation, which produces a clustering of chemokine receptors into this micro domain. Clustering of chemokine receptors, in turn, increases local concentration of chemokines on a host cell’s extracellular surface and allows these chemokines to interact with GPCRs. This interaction likely leads to increased immune signaling responses and chemokine stimulation. This combination of receptor relocalization and presentation of the chemokine complex with SgG2 provides a molecular rationale for enhancement of chemokine function during HSV infection. This immune modulation is in contrast to what is seen in other viruses that inhibit chemokine function, as in this case, chemokine function is potentiated by SgGs. Without being bound to any particular theory, it is thought that an overall manipulation of endogenous immune signaling may be overall favorable to HSV. 11. ICP47

[0291] Infected cell protein 47 (ICP47) encoded by gene US12, is a polymorphous protein and could block RNA splicing in early infection, and then, shuttle viral RNA from nucleus to cytoplasm in late infection. ICP47 directly binds antigen-dependent transporter (TAP), limiting antigen trafficking, leading to the occurrence of empty MHC-I (Cheng et.al., Virol J. 2020 Jul 10;17(1):101). The binding of ICP47 to TAP stabilizes the inward conformation, Page 49 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) therefore blocking the translocation pathway points to the endoplasmic reticulum (ER) cavity. By blocking the entry of viral antigens into ER, HSV could avoid the attack of cytotoxic T lymphocytes, which may lead to immune escape of HSV and establish lifelong infection in the host cells (Cheng et.al., Virol J.2020 Jul 10;17(1):101, which is incorporated herein by reference in its entirety). 12. VHS

[0292] The virion-host shutoff (VHS) protein is viral protein synthesized with late kinetics and packaged into mature virion particles. Functionally, VHS is a viral RNase that preferentially degrade both host and viral RNA species. VHS has been reported to interfere with dendritic cells (DC) activation during both productive and nonproductive HSV infection (Cotter et.al., J Virol. 2011 Dec; 85(23): 12662–12672., which is incorporated herein by reference in its entirety). 13. US3

[0293] All members of the Alphaherpesvirinae subfamily encode a serine / threonine kinase, designated US3. US3 is a significant virulence factor for herpes simplex virus type 1 (HSV-1) and is a multifunctional polypeptide that plays various roles in the viral life cycle by phosphorylating a number of viral and cellular substrates (Kato et.al., Adv Exp Med Biol. 2018;1045:45-62., which is incorporated herein by reference in its entirety). D. HSV Vaccines

[0294] Several HSV vaccines, mainly targeting HSV-2 and primarily focused on the generation of neutralizing antibodies (nAbs) targeting the viral envelope glycoprotein D as the correlate of immune protection, have been developed and evaluated in human clinical trial, see Table 1 below. Despite these vaccines exhibiting protection against HSV in preclinical studies and in some cases Phase 2 studies, none of these vaccines has demonstrated sufficient efficacy for further development or commercialization.

[0295] The present disclosure provides an insight that many prior strategies for developing pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) for treatment of and / or protection from HSV infection have focused primarily, or even almost exclusively, on development of neutralizing antibodies that target surface glycoproteins. The present disclosure identifies a problem with such strategies including, for example, that they may fail to appreciate value or even criticality of ensuring that an induced immune response includes significant T cell activity (in some embodiments, CD4 T cell activity, in some embodiments CD8 T cell activity, in some embodiments, both). In some embodiments, pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) that comprise or deliver CD4 and CD8 epitope(s) of one or more HSV antigens (e.g., HSV-1 antigens, HSV-2 antigens, or a combination thereof), e.g., in addition to one or more B cell antigens and / or epitopes may be used in treatment of and / or protection from HSV infection. Table 1: Certain HSV Vaccines Under Clinical Development Name Platform Antigens Immune Clinical results R isPage 50 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) gD / AS04 Subunit gD Neutralizing Abs Phase 3 Prophylaxis (GSK) AS04 adjuvant CD4+T cells 20% (95% CI: - 29%, 50%) tic tic g tic cy tic

[0296] The present disclosure provides the recognition that constructs and / or compositions provided herein may be administered as part of regimen with other therapeutic agents. The present disclosure also recognizes that subjects that are administered constructs and / or compositions provided herein may have previously been administered other therapeutic agents.

[0297] In some embodiments, for example, a subject may be receiving or had previously received an anti- viral agent for HSV. In some embodiments, an anti-viral agent can be administered to treat HSV-1 or HSV-2 infection Page 51 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) or recurrent episodes. In some embodiments, an anti-viral agent is or comprises acyclovir, valacyclovir, famciclovir, or a combination thereof. Table 2 below provides certain information about select anti-viral agents. Table 2: Antiviral Drugs for Treating HSV Approximate price Medication Dosage Most common adverse effects for complete 1084A. HSV Antigens

[0298] The present disclosure provides HSV (e.g., HSV-1, HSV-2 or both) antigens and antigenic fragments thereof can be useful in preventing or treating HSV, e.g., in HSV antigen constructs and / or HSV compositions (e.g., immunogenic compositions, e.g., vaccines) as further disclosed herein.

[0299] In some embodiments, HSV antigenic fragments can be useful in an HSV T cell antigen construct. In some embodiments, an HSV antigen (e.g., a full-length HSV antigen) can be useful in an HSV glycoprotein construct.

[0300] In some embodiments, a polyribonucleotide encodes one or more HSV antigens or antigenic fragments thereof. In some embodiments, a polyribonucleotide encodes an HSV glycoprotein construct.

[0301] A number of HSV antigens are known. The present disclosure provides a polyribonucleotide that encodes an HSV antigen as described herein or an antigenic fragment thereof. An overview of exemplary amino acid sequences of certain HSV (HSV-1, HSV-2, or both) proteins are provided in Tables 3-5 below. Exemplary amino acid sequences of certain HSV (HSV-1, HSV-2, or both) proteins are provided in Table 6 below. Page 52 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) Table 3: Exemplary antigens for HSV Antigen Kinetics Exemplary Amino Acid Sequences (SEQ ID NOs)Page 53 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) Table 4: Exemplary antigens selected from systematic analysis of source data Antigen Kinetics Exemplary Amino Acid Sequences (SEQ ID NOs)Antigen Kinetics Exemplary Amino Acid Sequences (SEQ ID NOs)Page 54 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) Table 6: Exemplary amino acid antigen sequences SEQ Antigen Strain Amino Acid Sequence ID NO 1 UL1 HG52 MGFVCLFGLVVMGAWGAWGGSQATEYVLRSVIAKEVGDILRVPCMRTPADDVS F R G F R G F R G G V A G L D G G V A G L D G G V A G L D G A P SPage 55 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) QVWFGHRYSQFMGIFEDRAPVPFEEVIDKINTKGVCRSTAKYVRNNMETTAF HRDDHETDMELKPAKVATRTSRGWHTTDLKYNPSRVEAFHRYGTTVNCIVEEVDA RSVYPYDEFVLATGDFVYMSPFYGYREGSHTEHTSYAADRFKQVDGFYARDL R Y T T T I L G R A P S F A L R Y T T T R A G Y T G V D V A D G E R E I N L E H R APage 56 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) WFGHRYSQFMGIFEDRAPVPFEEVIDKINAKGVCRSTAKYVRNNMETTAFHRD DHETDMELKPAKVATRTSRGWHTTDLKYNPSRVEAFHRYGTTVNCIVEEVDARSV YPYDEFVLATGDFVYMSPFYGYREGSHTEHTSYAADRFKQVDGFYARDLTTKA D G E R E I N L E V T CI P A I D L C N L V G V N R S Q Q L A V T CI P A I D L C N L V G V NPage 57 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) QLPARLLSREDIETIAFIKRFSLDYGAINFINLAPNNVSELAMYYMANQILRYCDHSTY FINTLTAVIAGSRRPPGVQAAAAWAPQGGAGLEAGARALMDSLDAHPGAWTSMFA SCNLLRPVMAARPMVVLGLSISKYYGMAGNDRVFQAGNWASLLGGKNACPLLIFDR P Q K V T CI P A I D L C N L V G V N R S Q Q L G Y V R D S FL R S M T S L A C T R P D LPage 58 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 14 UL39 333 MANRPAASALAGARSPSERQEPREPEVAPPGGDHVFCRKVSGVMVLSSDPPGPAAY RISDSSFVQCGSNCSMIIDGDVARGHLRDLEGATSTGAFVAISNVAAGGDGRTAVV ALGGTSGPSATTSVGTQTSGEFLHGNPRTPEPQGPQAVPPPPPPPFPWGHECCARR T G V R F K F G A L D VL HI L L L T Y V R T G V A C A N A K A SV M M S A T F A T T E FPage 59 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) EQKDILHYYVEQECIEVVHSRVYNIIQLVLFHNNDQARRAYVARTINHPA IRVKVDWLEARVRECDSIPEKFILMILIEGVFFAASFAAIAYLRTNNLLRVT CQSNDLISRDEAVHTTASCYIYNNYLGGHAKPEAARVYRLFREAVDIEIGFIRSQAPT E E V S Y G Q Q L P S G F P A D H Y L Q Q L P S G F P A D A I LL Q G R S G Q K PP P D EIPage 60 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) PWVRVYENICLRRQDAGGAAPPGDAPDSPYIEAENPLYDWGGSALFSPPGATRAPD PGLSLSPMPARPRTNALANDGPTNVAALSALLTKLKRGRHQSH 22 UL47 HG52 MSVRGHAVRRRRASTRSHAPSAHRADSPVEDEPEGGGVGLMGYLRAVFNVDDDSE V A G A R A W S L A F E V A G A R A W S L A F E V A G A R A W S L A F P L R F N D APage 61 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 26 UL48 333 MDLLVDDLFADADGVSPPPPRPAGGPKNTPAAPPLYATGRLSQAQLMPSPPMPVPP AALFNRLLDDLGFSAGPALCTMLDTWNEDLFSGFPTNADMYRECKFLSTL PSDVIDWGDAHVPERSPIDIRAHGDVAFPTLPATRDELPSYYEAMAQFFR F N D A P L R F N D A F G H D F A K D A F A K D A P V D R V Y A F D A G G D TPage 62 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) PPPRPPRPAALTRRPAEGPDPQGGWRRQPPGPSHTPAPSAAALEAYCAPRAVAELT DHPLFPAPWRPALMFDPRALASLAARCAAPPPGGAPAAFGPLRASGPLRRAAAWM RQVPDPEDVRVVILYSPLPGEDLAAGRAGGGPPPEWSAERGGLSCLLAAL L E P P V A R R T A G A A V V P V L E A N F G P N P D A A Y N R G L D F P APage 63 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) LEAYCAPRAVAELTDHPLFPAPWRPALMFDPRALASLAARCAAPPPGGAPAAFGPLR ASGPLRRAAAWMRQVPDPEDVRVVILYSPLPGEDLAAGRAGGGPPPEWS AERGGLSCLLAALGNRLCGPATAAWAGNWTGAPDVSALGAQGVLLLSTR C P E A GI G T T G S G A V R A K V P P GI G N L A R SS H A G G T V N GI G N L A R S H A D APage 64 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) GERRETSLGPRAAAPRGPRKCARKTRHAEGGPEPGARDPAPGLTRYLPIAGASSVVA LAPYVNKTVTGDCLPILDMETGHIGAYVVLVDQTGNVADLLRAAAPAWSRRTLLPE HARNCVRPPDYPTPPASEWNSLWMTPVGNMLFDQGTLVGALDFHGLRSRHPWSR Q VL P R V N R Q Q F N L Q N Q VL P R V N R Q Q F N L Q N Q VL P R V N R Q Q F N L QPage 65 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) MSVVNTNISEFVESIDSTELAMAINADYGISSKLAMTITRSQGLSLDKVAICFTPGN LRLNSAYVAMSRTTSSEFLHMNLNPLRERHERDDVISEHILSALRDPNVVIVY 40 UL9 HG52 MNVATCTHQTHHAARAPGATSAPGAASGDPLGARRPIGDDECEQYTSSVSLARML R LI L L S L G S R R L L Q R L T P L VL Q G S L A S M G R L T P L VL Q G S L A S M G RPage 66 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 43 UL19 HG52 MAAPARDPPGYRYAAAILPTGSILSTIEVASHRRLFDFFAAVRSDENSLYDVEFDALL GSYCNTLSLVRFLELGLSVACVCTKFPELAYMNEGRVQFEVHQPLIARDGPHPVEQP VHNYMTKVIDRRALNAAFSLATEAIALLTGEALDGTGISLHRQLRAIQQLARNVQAV D Q E L N R P R L P T VV A Y A F D F T L Q A C IK E D E P D YL P Q V H F E R G H A L EPage 67 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 45 UL19 MS MAAPARDPPGYRYAAAMVPTGSILSTIEVASHRRLFDFFARVRSDENSLYDVEFDAL LGSYCNTLSLVRFLELGLSVACVCTKFPELAYMNEGRVQFEVHQPLIARDGPHPVEQ PVHNYMTKVIDRRALNAAFSLATEAIALLTGEALDGTGISLHRQLRAIQQLARNVQA C IK E D E P D YL P Q V H F E R G H A L E A R G L D D R SS A R G L D D R SS N A R G LPage 68 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) YVGQRHYSAFECAVLCLYLLYRTTHESSPDRDRAPVAFGDLLARLPCYLARLAAVIGD ESGRPQYRYRDDKLPKAQFAAAGGRYEHGALATHVVIATLVRHGVLPAAPGDVPRD TSTRVNPDDVAHRDDVNRAAAAFLARGHNLFLWEDQTLLRATANTITALAVLR SS N T D A P AL G Q G I P V L C S K E T L A M T D A P AL G Q G I P V SL C S K E T L APage 69 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) CVTFKALFGNNAKITESLLKRFIPETWHPPDDVAARLRAAGFGPAGAGATAEETRRM LHRAFDTLA 51 UL30 MS MFCAAGGPTSPGGKSAARAASGFFAPHNPRGATQTAPPPCRRQNFYNPHLAQTGT D A P AL G Q G I P F S L M K E V P C L V Q L A L P M A L G G H A F F R D P A R DPage 70 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) RSCLRVSDREFITYIYLAHFECFSPPRLATHLRAVTTHDPSPAASTEQPSPLGREAVE QFFRHVRAQLNIREYVKQNVTPRETALAGDAAAAYLRARTYAPAALTPAPAYCGVAD SSTKMMGRLAEAERLLVPHGWPAFAPTTPGDDAGGGTAAPQTCGIVKRLLKLAATE E T P E Q VI A SV S D P A R D E D E E T P A VI A SV S G R R SL T C G R S L P A TPage 71 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) ARLANRVERGVSEIDYTTVGVGAGETMHFYIPGACMAGLIEILDTHRQEC SSRVCELTASHTIAPLYVHGKYFYCNSLF 57 UL54 MS MATDIDMLIDLGLDLSDSELEEDALERDEEGRRDDPESDSSGECSSSDEDMEDPCG R S L P A T C E V D R L S P E D L S P E V D R L S P E V D R L S P E D P M Y APage 72 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) IAARLECEFGTFDWTSEEGSQPWLSAVVADTSSAERSGLPAPGACRATEAPEREDG CRKMRFPAACPYPCGHTFLRP 62 US7 HG52 GPTVSLVSDSLVDAGAVGPQGFVEEDLRVFGELHFVGAQVPHTNYYDGIIELFHYPL T L R E H G G Q T E H G G R T E H G G Q T A P S A S A G G W N E G A A H A PPage 73 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) EVSHVRGVTVHMETPEAILFAPGETFGTNVSIHAIAHDDGPYAMDVVWMRFDVPSS CAEMRIYEACLYHPQLPECLSPADAPCAVSSWAYRLAVRSYAGCSRTTPPPRCFAEA RMEPVPGLAWLASTVNLEFQHASPQHAGLYLCVVYVDDHIHAWGHMTIS A G R L F Q V P A Q A P VL P P P A R L A L G A F L P P P A R L A L G A F L P P PPage 74 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) DREGLTFPRGDDGATERHPDGRRNAPPPGPPAGAPRHPTTNLSIAHLHNASVTWLA ARGLLRTPGRYVYLSPSASTWPVGVWTTGGLAFGCDAALVRARYGKGFMGLVISMR DSPPAEIIVVPADKTLARVGNPTDENAPAVLPGPPAGPRYRVFVLGAPTPADNGSAL A L G A F L P P P A R L A L G V V L V C T AL P T A R A Q V P R D R A T C D LPPage 75 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) ADHRAFFRTVIEVSRLCALNTHDPPPPLAGARVGQEAQLVHTQWLRANRESSPLWP WRTAAMNFIAAAAPCVQTHRHMHDLLMACAFWCCLAHASTCSYAGLYSAHCQHLF RAFGCGPPVLTTSRGQGGWCN D L W L D D A Q G P G A A H P P G A A H P P E A I L G P S TI Y A E A I L G PPage 76 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) PPPGDGSYLWIPAFHYNQLVTGQSAPHHPPLTACGLPAAGTVAYGHPGAGPSPHYP PPPAHPYPGMLFAGPSPLEAQIAALVGAIAADRQAGGLPAAAGDHGIRGS AKRRRHEVEQPEYDCGRDEPDRDFPYYPGEARPEPRPVDSRRAARQASGPHETI Y A E A I L G P P S TI Y A E A I L G P P TI Y A, .g., HSV-1 antigen constructs, HSV-2 antigen constructs, or a combination thereof) particularly useful in effective vaccination.

[0303] In various embodiments, an HSV antigen construct includes and / or encodes a plurality of HSV antigens (e.g., a plurality of HSV antigens that are or include one or more T cell and / or B cell antigens for HSV). As disclosed herein, T cell antigens include, e.g., CD4 T cell antigens and / or CD8 T cells. In some embodiments, an HSV antigen is a T cell antigen. In some embodiments, an HSV antigen is a B cell antigen.

[0304] In some embodiments, an HSV antigen construct can include and / or encode at least one of UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, UL49, RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one of UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, and / or UL49 or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one of RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof. Page 77 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0305] In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, or 19 of) UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, UL49, RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 of) UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, and / or UL49 or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, or 9 of) RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof.

[0306] In some embodiments, an HSV antigen constructs comprises and / or encodes UL54, UL29, UL39, UL9, UL30a (UL30.1), UL40, UL5a (UL5.1), UL21, and / or UL46 or fragments thereof.

[0307] In some embodiments, an HSV antigen constructs comprises and / or encodes UL54, UL29, UL40, and / or UL47 or fragments thereof.

[0308] In some embodiments, an HSV antigen constructs comprises and / or encodes at least UL47 or fragments thereof.

[0309] In some embodiments, an HSV antigen constructs comprises and / or encodes at least UL40 or fragments thereof.

[0310] In some embodiments, an HSV antigen constructs comprises and / or encodes one or more of RL2, UL54, UL9, UL39, UL29, UL5, UL40, UL30, UL49, UL46 and / or UL21 or fragments thereof.

[0311] The UL1 open reading frame encodes HSV gL (also referred to herein as UL1 polypeptide). In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL1 polypeptide or fragment thereof. In various embodiments, a UL1 polypeptide or fragment thereof has at least 80% sequence identity with a UL1 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL1 polypeptides known in the art include UL1 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL1 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 1, 2 and / or 3.

[0312] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL21 polypeptide or fragment thereof. In various embodiments, a UL21 polypeptide or fragment thereof has at least 80% sequence identity with a UL21 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL21 polypeptides known in the art include UL21 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL21 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 4, 5 and / or 6. Page 78 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0313] The UL27 open reading frame encodes HSV gB (also referred to herein as UL27 polypeptide). In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL27 polypeptide or fragment thereof. In various embodiments, a UL27 polypeptide or fragment thereof has at least 80% sequence identity with a UL27 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL27 polypeptides known in the art include UL27 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL27 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 7, 8, 9 and / or 74.

[0314] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL29 polypeptide or fragment thereof. In various embodiments, a UL29 polypeptide or fragment thereof has at least 80% sequence identity with a UL29 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL29 polypeptides known in the art include UL29 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL29 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 10, 11, and / or 12.

[0315] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL39 polypeptide or fragment thereof. In various embodiments, a UL39 polypeptide or fragment thereof has at least 80% sequence identity with a UL39 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL39 polypeptides known in the art include UL39 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL39 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 13, 14 and / or 15.

[0316] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL40 polypeptide or fragment thereof. In various embodiments, a UL40 polypeptide or fragment thereof has at least 80% sequence identity with a UL40 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL40 polypeptides known in the art include UL40 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL40 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 16, 17 and / or 18. Page 79 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0317] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL46 polypeptide or fragment thereof. In various embodiments, a UL46 polypeptide or fragment thereof has at least 80% sequence identity with a UL46 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL46 polypeptides known in the art include UL46 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL46 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 19, 20 and / or 21.

[0318] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL47 polypeptide or fragment thereof. In various embodiments, a UL47 polypeptide or fragment thereof has at least 80% sequence identity with a UL47 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL47 polypeptides known in the art include UL47 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL47 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 22, 23 and / or 24.

[0319] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL48 polypeptide or fragment thereof. In various embodiments, a UL48 polypeptide or fragment thereof has at least 80% sequence identity with a UL48 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL48 polypeptides known in the art include UL48 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL48 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 25, 26 and / or 27.

[0320] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL49 polypeptide or fragment thereof. In various embodiments, a UL49 polypeptide or fragment thereof has at least 80% sequence identity with a UL49 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL49 polypeptides known in the art include UL49 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL49 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 28, 29 and / or 30.

[0321] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a RS1 polypeptide or fragment thereof. In various embodiments, a RS1 polypeptide or fragment thereof has at least 80% Page 80 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) sequence identity with a RS1 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of RS1 polypeptides known in the art include RS1 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a RS1 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 31, 32 and / or 33.

[0322] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a RL2 polypeptide or fragment thereof. In various embodiments, a RL2 polypeptide or fragment thereof has at least 80% sequence identity with a RL2 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of RL2 polypeptides known in the art include RL2 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a RL2 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 34, 35 and / or 36.

[0323] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL5 polypeptide or fragment thereof. In various embodiments, a UL5 polypeptide or fragment thereof has at least 80% sequence identity with a UL5 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL5 polypeptides known in the art include UL5 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL5 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 37, 38 and / or 39.

[0324] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL9 polypeptide or fragment thereof. In various embodiments, a UL9 polypeptide or fragment thereof has at least 80% sequence identity with a UL9 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL9 polypeptides known in the art include UL9 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL9 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 40, 41 and / or 42.

[0325] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL19 polypeptide or fragment thereof. In various embodiments, a UL19 polypeptide or fragment thereof has at least 80% sequence identity with a UL19 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or Page 81 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 100% sequence identity). Examples of UL19 polypeptides known in the art include UL19 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL19 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 43, 44 and / or 45.

[0326] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL25 polypeptide or fragment thereof. In various embodiments, a UL25 polypeptide or fragment thereof has at least 80% sequence identity with a UL25 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL25 polypeptides known in the art include UL25 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL25 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 46, 47 and / or 48.

[0327] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL30 polypeptide or fragment thereof. In various embodiments, a UL30 polypeptide or fragment thereof has at least 80% sequence identity with a UL30 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL30 polypeptides known in the art include UL30 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL30 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 49, 50 and / or 51.

[0328] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL52 polypeptide or fragment thereof. In various embodiments, a UL52 polypeptide or fragment thereof has at least 80% sequence identity with a UL52 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL52 polypeptides known in the art include UL52 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL52 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 52, 53 and / or 54.

[0329] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a US1 polypeptide or fragment thereof. In various embodiments, a US1 polypeptide or fragment thereof has at least 80% sequence identity with a US1 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of US1 polypeptides known in the art include US1 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a US1 Page 82 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 58, 271, 59, 60 and / or 61.

[0330] The US7 open reading frame encodes HSV gI (also referred to herein as US7 polypeptide). In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a US7 polypeptide or fragment thereof. In various embodiments, a US7 polypeptide or fragment thereof has at least 80% sequence identity with a US7 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of US7 polypeptides known in the art include US7 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a US7 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 62, 63, 64 and / or 65.

[0331] The US8 open reading frame encodes HSV gE (also referred to herein as US8 polypeptide). In some embodiments, an HSV antigen is (e.g., a T cell or B cell antigen for HSV) or includes a US8 polypeptide or fragment thereof. In various embodiments, a US8 polypeptide or fragment thereof has at least 80% sequence identity with a US8 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of US8 polypeptides known in the art include US8 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a US8 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 66, 67, 68 and / or 69.

[0332] The UL22 open reading frame encodes HSV gH (also referred to herein as UL22 polypeptide). In some embodiments, an HSV antigen is (e.g., a T cell or B cell antigen for HSV) or includes a UL22 polypeptide or fragment thereof. In various embodiments, a UL22 polypeptide or fragment thereof has at least 80% sequence identity with a UL22 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL22 polypeptides known in the art include UL22 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL22 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 70, 71, 72 and / or 73.

[0333] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a US10 polypeptide or fragment thereof. In various embodiments, a US10 polypeptide or fragment thereof has at least 80% sequence identity with a US10 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of US10 polypeptides known in the art include US10 polypeptides encoded by Page 83 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a US10 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 260, 261, 262 and / or 263.

[0334] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a US12 polypeptide or fragment thereof. In various embodiments, a US12 polypeptide or fragment thereof has at least 80% sequence identity with a US12 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of US12 polypeptides known in the art include US12 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a US12 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NO: 264.

[0335] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL26 polypeptide or fragment thereof. In various embodiments, a UL26 polypeptide or fragment thereof has at least 80% sequence identity with a UL26 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL26 polypeptides known in the art include UL26 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL26 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 267, 268, 269, and / or 270.

[0336] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL50 polypeptide or fragment thereof. In various embodiments, a UL50 polypeptide or fragment thereof has at least 80% sequence identity with a UL50 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL50 polypeptides known in the art include UL50 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL50 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 265 and / or 266.

[0337] In some embodiments, an HSV antigen (e.g., a T cell or B cell antigen for HSV) is or includes a UL54 polypeptide or fragment thereof. In various embodiments, a UL54 polypeptide or fragment thereof has at least 80% sequence identity with a UL54 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof (e.g., at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity). Examples of UL54 polypeptides known in the art include UL54 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL54 polypeptide or fragment thereof has at least 80%, such as at least 85%, at least 90%, at least 91%, at least 92%, at Page 84 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity with an amino acid sequence as set forth in SEQ ID NOs: 55, 56, and / or 57.

[0338] In some embodiments, an HSV antigen construct can include and / or encode one or more HSV antigens including one or more T cell antigens (e.g., CD4 and / or CD8 T cell antigens) for HSV of the present disclosure and one or more HSV antigens that is not a T cell antigen of the present disclosure. In some embodiments, an HSV antigen construct can include and / or encode one or more HSV antigens including one or more B cell antigens for HSV of the present disclosure and one or more HSV antigens that is not a B cell antigen of the present disclosure. In some embodiments, an HSV antigen construct can include and / or encode one or more HSV antigens including one or more T cell antigens for HSV of the present disclosure and one or more HSV antigens that is a B cell antigen for HSV (e.g., an antigen that is or includes a B cell epitope disclosed herein or otherwise known in the art). In some embodiments, an HSV antigen construct can include and / or encode one or more HSV antigens including one or more T cell antigens for HSV of the present disclosure and one or more HSV antigens selected from HSV glycoproteins or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode one or more HSV antigens including one or more T cell antigens for HSV of the present disclosure and one or more HSV antigens selected from an HSV gD protein or an antigenic fragment thereof, an HSV gB protein or an antigenic fragment thereof, an HSV gE protein or an antigenic fragment thereof, an HSV gG protein or an antigenic fragment thereof, an HSV gI protein or an antigenic fragment thereof, an HSV gH protein or an antigenic fragment thereof, an HSV gL protein or an antigenic fragment thereof, an HSV ICP4 protein or an antigenic fragment thereof, or an ICP8 protein or an antigenic fragment thereof.

[0339] In various embodiments, an HSV antigen construct can be present in a composition for delivery of the HSV antigen construct to a subject. In various embodiments, an HSV antigen construct can be present in a composition for delivery of one or more HSV antigens and / or epitopes to a subject. In various embodiments, an HSV antigen construct can be or include an RNA molecule that encodes one or more antigens and / or epitopes.

[0340] Compositions for delivery of HSV antigen constructs and / or HSV antigen constructs can, in some embodiments, advantageously include, for example, one or more B cell antigens for HSV and one or more T cell antigens (e.g., CD4 and / or CD8 T cell antigens) for HSV. Without wishing to be bound by any particular scientific theory, and without suggesting other embodiments are also advantageous, combination of B cell antigens and T cell antigens can be advantageous in promoting immune system defenses against HSV at multiple lifecycle points include without limitation prior to cellular entry and after cellular entry.

[0341] Among other things, the present disclosure provides an insight that many prior strategies for developing pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) for treatment of and / or protection from viral infection have focused primarily, or even almost exclusively, on development of neutralizing antibodies that target surface glycoproteins. The present disclosure identifies a problem with such strategies including, for example, that they may fail to appreciate value or even criticality of ensuring that an induced immune response includes significant T cell activity (in some embodiments, CD4 T cell activity, in some embodiments CD8 T cell activity, in some embodiments, both). Page 85 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0342] Alternatively or additionally, the present disclosure provides an insight that consideration of expression of HSV proteins (e.g., at particular periods of the HSV life cycle and / or in particular tissues or compartments of an infected subject) can improve composition effectiveness.

[0343] In some embodiments, the present disclosure provides technologies for identifying, selecting, and / or characterizing HSV protein sequences (e.g., HSV-1 protein sequences, HSV-2 protein sequences, or a combination thereof), and combinations thereof, particularly useful for inclusion in pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) as provided herein.

[0344] In some embodiments, pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) that comprise or deliver CD4 and CD8 antigen(s) of one or more HSV proteins (e.g., HSV-1 proteins, HSV-2 proteins, or a combination thereof), e.g., in addition to one or more B cell antigens. Among other things, the present disclosure provides HSV antigen constructs (e.g., HSV-1 antigen constructs, HSV-2 antigen constructs, or a combination thereof) and compositions (e.g., pharmaceutical compositions, e.g., immunogenic compositions, e.g., vaccines) that comprise and / or deliver antigen constructs that induce both neutralizing antibodies and T cells (e.g., CD4 and / or CD8 T cells). Such neutralizing antibodies and T cells (e.g., CD4 and / or CD8 T cells) can target, for example, an HSV glycoprotein and, in some embodiments, one or more additional HSV proteins. In some embodiments, the present disclosure provides such constructs and compositions that induce particularly strong neutralizing antibody responses and / or particularly diverse T cell responses (e.g., targeting multiple T cell antigens).

[0345] In some embodiments, the present disclosure provides such constructs and compositions that induce robust B cell responses. In some embodiments, a B cell response includes the production of a diverse, specific repertoire of antibodies.

[0346] In some embodiments, the present disclosure provides such constructs and compositions that induce T cell and B cell responses to HSV antigens and / or epitopes.

[0347] The present disclosure provides the recognition, for example, that constructs and compositions comprising RNA molecules as provided herein (e.g., encoding for one or more HSV (e.g., HSV-1 and / or HSV-2) antigens and / or epitopes) may result in a higher degree of antigen presentation to various immune system components and / or pathways. In some embodiments, administration of such constructs or compositions may induce T cell and / or B cell responses. The present disclosure provides the insight that, e.g., in some embodiments in which T cell and B cell responses are induced in a subject, the subject may have a more sustained, long-term immune response. Such an immune response can be beneficial, e.g., for preventing HSV (e.g., HSV-1 and / or HSV-2) reactivation with a single administration, which may increase vaccination rates and subject compliance as compared with presently available vaccines that require dosing every few years. In some embodiments, constructs and compositions comprising RNA molecules as provided herein (e.g., encoding for one or more HSV (e.g., HSV-1, HSV-2, or a combination thereof) antigens and / or epitopes) can provide more diverse protection (e.g., protection against HSV (e.g., HSV-1 and / or HSV-2) variants) because, without wishing to be bound to any particular theory, the constructs and compositions can induce multiple immune system responses.

[0348] The present disclosure also provides the recognition that, by administering constructs and compositions that encode HSV (e.g., HSV-1 and / or HSV-2) antigens and / or epitopes, the constructs and compositions Page 86 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) provided herein avoid administering HSV (e.g., HSV-1 and / or HSV-2) virions, which may infect the subject, go into latency, and reactivate to cause a flare-up.

[0349] Still further, the present disclosure provides an insight (and also identifies a source of a problem in some prior HSV vaccination strategies) that, in some embodiments, particularly effective pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) alter one or more characteristics of the innate immune system. The present disclosure provides some such compositions, including, for example, compositions that comprise RNA construct(s) encoding HSV (e.g., HSV-1 and / or HSV-2) protein(s) (e.g., HSV antigens or HSV epitopes) as provided herein.

[0350] Separately, in some embodiments, the present disclosure provides particular pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) formats including, for example, RNA pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) comprising particular elements and / or sequences useful for vaccination.

[0351] The present disclosure provides a variety of insights and technologies related to such HSV (e.g., HSV-1 and / or HSV-2) antigen constructs and compositions (e.g., immunogenic compositions, e.g., RNA vaccines).

[0352] As described herein, in many embodiments, provided compositions (e.g. pharmaceutical compositions, e.g., immunogenic compositions, e.g., vaccines) include an RNA active encoding one or more HSV (e.g., HSV-1 and / or HSV-2) polypeptides or antigenic fragments thereof; in some embodiments such RNA active is a modified RNA format in that its uridine residues are substituted with uridine analog(s) such as pseudouridine; alternatively or additionally, in some embodiments, such RNA active includes particular elements (e.g., cap, 5’UTR, 3’UTR, polyA tail, etc.) and / or characteristics (e.g., codon optimization) identified, selected, characterized, and / or demonstrated to achieve significant (e.g., elevated) translatability (e.g., in vitro) and / or expression (i.e., in a subject to whom it has been administered) of encoded protein(s). Still further alternatively or additionally, in some embodiments, such RNA active includes particular elements and / or characteristics identified, selected, characterized, and / or demonstrated to achieve significant RNA stability and / or efficient manufacturing, particularly at large scale (e.g., 0.1-10 g, 10-500 g, 500 g-1 kg, 750 g-1.5 kg; those skilled in the art will appreciate that different products may be manufactured at different scales, e.g., depending on patient population size). In some embodiments, such RNA manufacturing scale may be within a range of about 0.01 g / hr RNA to about 1 g / hr RNA, 1 g / hr RNA to about 100 g / hr RNA, about 1 g RNA / hr to about 20 g RNA / hr, or about 100 g RNA / hr to about 10,000 g RNA / hr. In some embodiments, such RNA manufacturing scale may be tens or hundreds of milligrams to tens or hundreds of grams (or more) of RNA per batch. In some embodiments, such RNA manufacturing scale may allow a batch size within a range of about 0.01 g to about 500 g RNA, about 0.01 g to about 10 g RNA, about 1 g to about 10 g RNA, about 10 g to about 500 g RNA, about 10 g to about 300 g RNA, about 10 g to about 200 g RNA or about 30 g to about 60 g RNA.

[0353] Still further, in many embodiments, provided compositions (e.g., pharmaceutical compositions, e.g., immunogenic compositions, e.g., vaccines) that include an RNA active are prepared, formulated, and / or utilized in particular LNP compositions, as described herein. Page 87 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0354] Among other things, the present disclosure provides technologies for rapid development of a pharmaceutical composition (e.g., immunogenic composition, e.g., HSV vaccine) for delivering particular HSV (e.g., HSV-1 and / or HSV-2) antigen constructs to a subject.

[0355] Additionally, the present disclosure provides, for example, nucleic acid constructs encoding HSV (e.g., HSV-1 and / or HSV-2) antigens as described herein, expressed HSV (e.g., HSV-1 and / or HSV-2) proteins, and various methods of production and / or use relating thereto, as well as compositions developed therewith and methods relating thereto.

[0356] For example, the present disclosure provides technologies for preventing, characterizing, treating, and / or monitoring HSV (e.g., HSV-1 and / or HSV-2) outbreaks and / or infections including, as noted, various nucleic acid constructs and encoded proteins, as well as agents (e.g., antibodies) that bind to such proteins, and compositions that comprise and / or deliver them.

[0357] In some embodiments, provided herein are technologies (e.g., compositions and methods) for augmenting, inducing, promoting, enhancing and / or improving an immune response against HSV (e.g., HSV-1 and / or HSV-2) or a component thereof (e.g., a protein or fragment thereof). In some embodiments, technologies provided herein are designed to augment, induce, promote, enhance and / or improve immunological memory against HSV (e.g., HSV-1 and / or HSV-2) or a component thereof (e.g., a protein or fragment thereof). In some embodiments, technologies described herein are designed to act as an immunological boost to a primary composition (e.g., an immunogenic composition, a vaccine), such as a composition (e.g., an immunogenic composition, a vaccine) directed to an antigen and / or epitopes of HSV (e.g., HSV-1 and / or HSV-2). In some embodiments, compositions of the present disclosure comprise one or more polynucleotide constructs (e.g., one or more string constructs) that encode one or more antigens from HSV (e.g., HSV-1 and / or HSV-2). In some embodiments, the present disclosure provides compositions (e.g., immunogenic compositions, vaccines) comprising nucleic acids encoding such HSV (e.g., HSV-1 and / or HSV-2) antigens; those skilled in the art will appreciate from context when reference to a particular polynucleotide (e.g., a DNA or RNA) as “encoding” such antigens in fact is referencing a coding strand or its complement.

[0358] The present disclosure provides pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) that deliver particular HSV antigen constructs to a subject (e.g., a patient) and related technologies (e.g., methods). In some embodiments, the present disclosure provides pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) that deliver particular HSV-1 antigen constructs to a subject (e.g., a patient) and related technologies (e.g., methods). In some embodiments, the present disclosure provides pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) that deliver particular HSV-2 antigen constructs to a subject (e.g., a patient) and related technologies (e.g., methods). In some embodiments, the present disclosure provides pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) that deliver particular HSV-1 and HSV-2 antigen constructs to a subject (e.g., a patient) and related technologies (e.g., methods).

[0359] The present disclosure further provides the recognition that some HSV antigens are common to both HSV-1 and HSV-2. The present disclosure also provides the recognition that some HSV antigens include sequences conserved between HSV-1 and HSV-2. In addition, the present disclosure recognizes that some HSV-1 antigens have, e.g., at least 75%, at least 80%, at least 85%, at least 90%, at least 91%, at least 92%, at least Page 88 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, or at least 99% identity to comparable HSV-2 antigens.

[0360] In some embodiments, the present disclosure provides some HSV antigen constructs particularly useful in effective vaccination. In some embodiments, HSV antigen constructs are HSV-1 antigen construct, HSV-2 antigen constructs, or a combination thereof.

[0361] Antigens utilized in accordance with the present disclosure are or include HSV (e.g., HSV-1 and / or HSV-2) components (e.g., antigenic fragments thereof, including epitopes that may comprise non-amino acid, e.g., carbohydrate moieties), which components induce immune responses when administered to humans (or other animals such as rodents and non-human primates susceptible to HSV (e.g., HSV-1 and / or HSV-2) infection).

[0362] In many embodiments, antigens utilized in provided pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) include both B-cell and T-cell antigens and / or epitopes, as described herein. In some embodiments, delivered antigens include both B-cell and T cell (e.g., CD4 and / or CD8 T cell) antigens and / or epitopes, optionally together in a single antigen polypeptide. In some embodiments, antigens utilized in provided pharmaceutical compositions (e.g., immunogenic compositions, e.g., vaccines) include T cell antigens and / or epitopes. In some embodiments, antigens utilized in provided pharmaceutical compositions (e.g., immunogenic composition, e.g., vaccine), together, include B cell, CD4 T cell and CD8 T cell epitopes. Indeed, in some embodiments, the present disclosure defines particularly useful epitopes for inclusion in HSV (e.g., HSV-1 and / or HSV-2) compositions (e.g., immunogenic compositions, vaccines), and / or provides antigens that include them.

[0363] Exemplary antigens and / or epitopes for use in compositions provided herein included those provided in, e.g., Tables 3-5 herein and antigenic fragments thereof. In some embodiments, exemplary antigens disclosed in Tables 3-5, and / or fragments and / or epitopes thereof, can be useful for compositions described herein.

[0364] In some embodiments, a provided pharmaceutical composition (e.g., immunogenic composition, e.g., HSV (e.g., HSV-1 and / or HSV-2) vaccine) comprises or delivers (e.g., causes expression of in a recipient organism, for example by administration of a nucleic acid construct, such as an RNA construct as provided herein, that encodes it) an antigen that is or comprises one or more epitopes (e.g., one or more B-cell and / or one or more T-cell antigens and / or epitopes) of an HSV (e.g., HSV-1 and / or HSV-2) protein. In some embodiments, a pharmaceutical composition provided herein induces a relevant immune response effective against HSV (e.g., by targeting an HSV-1 protein, an HSV-2 protein, or a combination thereof).

[0365] In some embodiments, a provided pharmaceutical composition (e.g., immunogenic composition, e.g., HSV (e.g., HSV-1 and / or HSV-2) vaccine) comprises or delivers an antigen that is or comprises a full-length HSV (e.g., HSV-1 and / or HSV-2) protein. In some embodiments, a provided pharmaceutical composition (e.g., immunogenic composition, e.g., HSV (e.g., HSV-1 and / or HSV-2) vaccine) comprises or delivers an antigen that is or comprises a fragment of an HSV (e.g., HSV-1 and / or HSV-2) protein that is less than a full-length HSV (e.g., HSV-1 and / or HSV-2) protein. In some embodiments, a provided pharmaceutical composition (e.g., immunogenic composition, e.g., HSV (e.g., HSV-1 and / or HSV-2) vaccine) comprises or delivers a chimeric polypeptide that is or comprises part or all of an HSV (e.g., HSV-1 and / or HSV-2) protein and one or more heterologous polypeptide elements. Page 89 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0366] In some embodiments, an antigen that is included in and / or delivered by a provided pharmaceutical composition (e.g., immunogenic composition, e.g., HSV (e.g., HSV-1 and / or HSV-2) vaccine) is or comprises one or more peptide fragments of an HSV (e.g., HSV-1 and / or HSV-2) antigen; in some such embodiments, each of the one or more peptide fragments includes at least one epitope (e.g., one or more B cell epitopes and / or one or more T cell epitopes), for example as may be predicted, selected, assessed and / or characterized as described herein.

[0367] In some embodiments, an antigen that is included in and / or delivered by a provided pharmaceutical composition (e.g., immunogenic composition, e.g., HSV (e.g., HSV-1 and / or HSV-2) vaccine) is or comprises a plurality of peptide fragments of one or more HSV (e.g., HSV-1 and / or HSV-2) antigens. In some embodiments, a single polypeptide antigen may include a plurality of such fragments, e.g., presented as a string of antigens or fragments thereof as described herein (e.g., in that a single polypeptide includes a plurality of amino acid sequences derived from distinct HSV antigens or fragments thereof, optionally separated by or otherwise associated with amino acid linkers or other intervening or terminal amino acid sequences). In some embodiments, a single RNA antigen construct may include a plurality of sequences encoding HSV antigens, e.g., presented as a string of antigen encoding sequences as described herein (e.g., in that a single RNA molecule includes a plurality of nucleic acid sequences encoding distinct HSV antigens or fragments thereof, optionally separated by or otherwise associated with nucleic acid linkers or other intervening or terminal nucleic acid sequences).

[0368] In some embodiments, one or more HSV (e.g., HSV-1 and / or HSV-2) antigens or antigenic fragments thereof may be linked with one or more sequences with which it is linked in nature. In some such embodiments, such sequence(s) may be or comprise one or more heterologous elements (e.g., one or more elements, not naturally found in the relevant HSV (e.g., HSV-1 and / or HSV-2) such as a polypeptide or antigenic fragment thereof not naturally found to be directly linked to the relevant HSV (e.g., HSV-1 and / or HSV-2) antigen(s)). For example, in some embodiments, an antigen peptide provided and / or utilized in accordance with the present disclosure may include one or more linker elements and / or one or more membrane association elements and / or one or more secretion elements, etc. In some embodiments, an antigenic polypeptide may comprise a plurality of HSV (e.g., HSV-1 and / or HSV-2) protein fragments or epitopes separated from one another by linkers.

[0369] In some embodiments, an HSV (e.g., HSV-1 and / or HSV-2) polypeptide, or fragment or epitope thereof, utilized in a construct as described herein (or encoded by a polyribonucleotide describe herein) may include one or more sequence alterations relative to a particular reference HSV (e.g., HSV-1 and / or HSV-2) polypeptide, or fragment or epitope thereof. For example, in some embodiments, a utilized antigen may include one or more sequence variations found in circulating strains or predicted to arise, e.g., in light of assessments of sequence conservation and / or evolution of HSV (e.g., HSV-1 and / or HSV-2) polypeptides over time and / or across strains. Alternatively or additionally, in some embodiments, a utilized antigen may include one or more sequence variations selected, for example, to impact stability, folding, processing and / or display of the antigen or any epitope thereof.

[0370] In some embodiments, an HSV (e.g., HSV-1 and / or HSV-2) polypeptide, or fragment or epitope thereof, utilized in an antigen as described herein shows at least 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% amino acid sequence identity with a relevant corresponding reference (e.g., wild-type) Page 90 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) polypeptide, fragment or epitope. In some embodiments, an HSV (e.g., HSV-1 and / or HSV-2) polypeptide, or fragment or epitope thereof, utilized in an antigen as described herein shows at least 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence homology (i.e., identity or conservative substitution as is understood in the art) amino acid sequence identity with a relevant corresponding reference (e.g., wild-type) protein, fragment or epitope. Moreover, in some embodiments, an HSV (e.g., HSV-1 and / or HSV-2) polypeptide, or fragment or epitope thereof, utilized in an antigen as described herein shares conserved amino acid residues (e.g., at corresponding positions) with a relevant corresponding reference (e.g., wild-type) polypeptide, fragment or epitope. Those skilled in the art will appreciate that, in general, lower percent identity or homology may be tolerated for shorter peptides, as a single change will by definition have a larger impact on percent identity or homology when considered relative to a smaller number of residues. For example, those skilled in the art will appreciate that, for sequences longer than about 20 amino acids, percent identity or homology is typically greater than about 80%; for sequences longer than about 50 amino acids, percent identity or homology is typically greater than about 90%.

[0371] In some embodiments, assessments of degree of conservation may consider the physiochemical difference between two amino acids as described, for example, in WO2014 / 180569, which is incorporated herein by reference in its entirety. It is well known in molecular evolution that amino acids that interchange frequently are likely to have chemical and physical similarities whereas amino acids that interchange rarely are likely to have different physico-chemical properties. The likelihood for a given substitution to occur in nature compared with the likelihood for this substitution to occur by chance can measured by log-odds matrices. The patterns observed in log- odds matrices imposed by natural selection “reflect the similarity of the functions of the amino acid residues in their weak interactions with one another in the three-dimensional conformation of proteins” (see Dayhoff et al. Atlas of protein sequence and structure 5:345, 1978180569, which is incorporated herein by reference in its entirety). In some embodiments, evolutionary based log-odds matrices, which may be referred to as “T scores” can be used to reflect extent to which a sequence variation might impact T cell recognition. Substitutions with positive T scores (i.e., log-odds) are likely to occur in nature, and hence correspond to two amino acids that have similar physico-chemical properties. Substitutions with positive T scores would have a lower likelihood of altering immunogenicity. Conversely, substitutions with negative T scores reflect substitutions that are unlikely to occur in nature and hence correspond to two amino acids that have significantly different physico-chemical properties. Such substitutions would have a greater chance of altering immunogenicity. In some embodiments, presence of negative T score substitutions within a sequence, even if it is otherwise highly conserved, may indicate that it would be relatively less useful in a composition (e.g., an immunogenic composition, a vaccine)as described herein.

[0372] In some embodiments, a utilized antigen induces an immune response that targets an HSV envelope glycoprotein. In some embodiments, one or more antigens induce an immune response that targets an HSV envelope glycoprotein. In some embodiments, one or more antigens comprises one or more HSV protein sequences (e.g., conserved sequences and / or sequences that are or comprise one or more B cell epitopes and / or one or more CD4 epitopes and / or one or more CD8 epitopes) of an antigen or epitope of an HSV envelope glycoprotein. In some embodiments, one or more antigens is or comprises an HSV gD protein or a fragment or epitope thereof. In some embodiments, one or more antigens is or comprises an HSV gB protein or a fragment or epitope thereof. In some embodiments, one or more antigens is or comprises an HSV gE protein or a fragment or epitope thereof. In some Page 91 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) embodiments, one or more antigens is or comprises an HSV gG protein or a fragment or epitope thereof. In some embodiments, one or more antigens is or comprises an HSV gI protein or a fragment or epitope thereof. In some embodiments, one or more antigens is or comprises an HSV gE protein or a fragment or epitope thereof. In some embodiments, one or more antigens is or comprises an HSV gH protein or a fragment or epitope thereof. In some embodiments, one or more antigens is or comprises an HSV gL protein or a fragment or epitope thereof. In some embodiments, one or more antigens is or comprises an HSV ICP4 protein or a fragment or epitope thereof. In some embodiments, one or more antigens is or comprises an ICP8 polypeptide, fragment, or epitope thereof.

[0373] In various embodiments, an HSV antigen construct includes and / or encodes a plurality of HSV antigens (e.g., a plurality of HSV antigens that are or include one or more T cell antigens for HSV) provided in Table 3, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one HSV antigen provided in Table 3, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one HSV antigen provided in Table 4, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one HSV antigen provided in Table 5, or fragments thereof.

[0374] In some embodiments, an HSV antigen construct can include and / or encode at least one T cell antigen for HSV provided in Table 3, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one T cell antigen for HSV provided in Table 4, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one T cell antigen for HSV provided in Table 5, or fragments thereof.

[0375] In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, or 19) HSV antigens provided in Table 3, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10) HSV antigens provided in Table 4, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, or 9) HSV antigens provided in Table 5, or fragments thereof.

[0376] In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, or 19) T cell antigens for HSV selected from HSV antigens provided in Table 3, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10) T cell antigens for HSV selected from antigens provided in Table 4, or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, or 9) T cell antigens for HSV selected from antigens provided in Table 5, or fragments thereof.

[0377] In some embodiments, an antigen utilized in accordance with the present disclosure includes HSV (e.g., HSV-1 and / or HSV-2) protein sequences identified and / or characterized by one or more of: 1) HLA-I or HLA-II binding (e.g., to HLA allele(s) present in a relevant population) 2) HLA ligandomics data, optionally confirmed by mass spectrometry 3) Relatively high expression 4) Sequence conservation Page 92 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 5) Surface exposure 6) Serum reactivity 7) Immunogenicity (e.g., presence of one or more B-cell and / or T-cell antigens and / or epitopes; evidence of ability to induce sterile protection in model systems including, e.g., humans, non-human primates, and / or mice). 8) Absence of sequences that overlap with human proteome.

[0378] In some embodiments, such characteristics are experimentally or computationally assessed. In some embodiments, such characteristics are assessed by consultation with published reports.

[0379] For example, in some embodiments, HLA-I and / or HLA-II binding is experimentally assessed; in some embodiments it is predicted.

[0380] In some embodiments, predicted HLA-I or HLA-II binding is assessed using an algorithm such as neonmhc 1 and / or neonmhc2, which predict and / or characterize likelihood of MHC class I and MHC class II binding, respectively. Alternatively or additionally, in some embodiments, an MHC-peptide presentation prediction algorithm or MHC-peptide presentation predictor is or comprises NetMHCpan or NetMHCIIpan. In some embodiments, a hidden Markov model approach may be utilized for MHC-peptide presentation prediction and / or characterization. In some embodiments, the peptide prediction model MARIA may be utilized. In some embodiments, NetMHCpan is not utilized to predict or characterize likelihood of MHC binding for peptides as described herein. In some embodiments, the peptide prediction model MARIA may be utilized. In some embodiments, NetMHCIIpan is not utilized to predict or characterize likelihood of MHC binding for peptides as described herein. In some embodiments, neither NetMHCpan nor NetMHCIIpan is utilized to predict or characterize likelihood of MHC binding for peptides as described herein. In some embodiments, an MHC-peptide presentation prediction algorithm or MHC-peptide presentation predictor is or comprises RECON®(Real-time Epitope Computation for Oncology), which offers high quality MHC-peptide presentation prediction based on expression, processing and binding capabilities. See, for example, Abelin et al., Immunity 21:315, 2017; Abelin et al., Immunity 15:766, 2019.

[0381] In some embodiments, HLA binding and / or ligandomics assessments will consider the geographic region of subjects to be immunized. For example, in some embodiments, HLA allelic diversity will be considered. In some embodiments, antigen(s) included in a provided pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) will be or comprise peptides (e.g., epitopes) expected or determined, when considered together, to bind to a significant percentage (e.g., at least 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or more) of HLA alleles expected or known to be present in a relevant region or population. In some embodiments, antigen(s) included in a provided pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) will be or comprise peptides expected or determined, when considered together, to bind to the most prevalent (e.g., the 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 most prevalent, or at least 1, 2, 3, 4, or 5 of the 10 most prevalent, etc.) HLA alleles expected or known to be present in a relevant region or population).

[0382] In some embodiments, expression level is experimentally determined (e.g., in a model system or in infected humans). In some embodiments, expression level is a reported level (e.g., in a published or presented report). In some embodiments, expression level is assessed as RNA (e.g., via RNASeq). In some embodiments (and typically preferably), expression levels is assessed as protein. Page 93 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0383] In some embodiments, sequence conservation is assessed, for example, using publicly available sequence evaluation software (such as, for example, multiple sequence alignment programs MAFFT, Clustal Omega, etc.). In some embodiments, sequence conservation is determined by consultation with published resources (e.g., sequences). In some embodiments, sequence conservation includes consideration of currently or recently detected strains (e.g., in an active outbreak).

[0384] In some embodiments, surface exposure is assessed by reference to publicly available database and / or software.

[0385] In some embodiments, serum reactivity is assessed by contacting serum samples from infected individuals with polypeptides including sequences of interest (e.g., as may be displayed via, for example, phage display or peptide array, etc; see, for example, Whittemore et al “ A General Method to Discover Epitopes from Sera” PlosOne, 2016; https: / / doi.org / 10.1371 / journal.pone.0157462, which is incorporated herein by reference in its entirety). In some embodiments, serum reactivity is assessed by consultation with literature reports and or database data indicating serum-recognized sequences.

[0386] In some embodiments, assessment of immunoreactivity and / or of presence of an epitope may be or comprise consultation with the Immune Epitope Database (IEDB) which those skilled in the art will be aware is a freely available resource funded by NIAID that catalogs experimental data on antibody and T cell epitopes (see iedb.org).

[0387] In some embodiments, antigen(s) utilized in accordance with the present disclosure are characterized by dendritic cell presentation which, in turn may be indicative of HLA binding and / or of immunogenicity.

[0388] In some embodiments, antigen(s) utilized in accordance with the present disclosure are or comprises sequences (e.g., epitopes, fragments, complete proteins) of HSV proteins found in the HSV envelope. In some embodiments, antigen(s) utilized in accordance with the present disclosure are or comprises sequences (e.g., epitopes, fragments, complete proteins) of HSV proteins found in the HSV tegument.

[0389] Among other things, the present disclosure provides an insight that, in some embodiments, it may be desirable to include two or more different epitopes, optionally from two or more different HSV (e.g., HSV-1 and / or HSV-2) proteins, in pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) compositions, which can be useful in the treatment of HSV. Table 7: Exemplary antigen fragments Antigen Sequence (Amino Acid) SEQ ID Fra ment NO:Page 94 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) UL54 ETLVAHGPSLYRTFAANPRAASTAKAMRDCVLRQENLIEALASADETLAWCKMCIHHNLP 177 fragment LRPQDPIIGTAAAVLENLATRLRPFLQCYLKARGLCGLDDLCSRRRLSDIKDIASFVLVILA RLANRVERGVSEIDYTTVGVGAGETMHFYIPGACMAGLIEILDTHRQECSSRVCELTASHPage 95 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) US1.1 DDASDGWLVDTPPRKSKRPRINLRLTSSPDRRAGVVFPEV 224 Fragment US12 PASLPGIAHAHRRSARQAQMRSGAAWTLDLHYIRQCVNQL 225

[0390] In some embodiments, an antigen utilized as described herein is or comprises a full-length viral protein. In some embodiments, an antigen utilized as described herein is or comprises a fragment or domain of a viral polypeptide, or an antigenic fragment thereof. In some embodiments, an antigen utilized as described herein is a membrane-tethered antigen (e.g., an antigenic fragment thereof fused with a membrane-associating moiety, such as for example, a transmembrane moiety). In some embodiments, a provided pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) comprises or delivers antigen sequences that are or comprise one or more antibody epitopes and / or one or more CD4 T cell and / or CD8 T cell epitopes.

[0391] In some embodiments, an antigen utilized as described herein includes one or more variant sequences relative to a relevant reference antigen. For example, in some embodiments, a protease cleavage site is removed or blocked; alternatively or additionally, in some embodiments, a terminally truncated antigen is utilized.

[0392] In some embodiments, an antigen utilized as described herein includes a multimerization element (e.g., a heterologous multimerization element).

[0393] In some embodiments, an antigen utilized as described herein includes a membrane association element (e.g., a heterologous membrane association element), such as a transmembrane domain.

[0394] In some embodiments, an antigen utilized as described herein includes a secretory signal (e.g., a heterologous secretory signal).

[0395] In some embodiments, utilized sequences may be longer (and, e.g., may therefore include more epitopes) than a viral protein found in nature. Page 96 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0396] In some embodiments, utilized sequences may be from a different strain or plurality of strains (e.g., as may be circulating in and / or otherwise relevant to a population to which a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) is administered).

[0397] In some embodiments, an antigen utilized as described herein may include a plurality of epitopes (e.g., B-cell and / or T-cell antigens and / or epitopes) arranged in a non-natural configuration (e.g., in a string construct as described herein). In some embodiments, an antigen utilized as described herein may include a plurality of epitopes predicted or demonstrated to bind HLA alleles reflective of a population to which a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) composition is to be administered as described herein.

[0398] In some embodiments, a provided pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) may comprise or deliver a plurality of antigens. one or more antigens that includes B cell epitopes and one or more antigens that includes T cell epitopes. In some embodiments, a provided pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) may comprise or deliver one antigen that includes both B cell and CD4 epitopes and a separate antigen that includes CD8 epitopes.

[0399] As described herein, in some embodiments, provided technologies involve administration of a plurality of antigens to the same subject. In some embodiments, multiple antigens are administered at the same time (e.g., in a single dose). In some embodiments, different antigens may be administered at different times (for example in different doses – e.g., a prime dose vs a boost dose). In some embodiments, multiple antigens are administered via the same composition.

[0400] For clarity, a single “antigen” polypeptide may include multiple “epitopes”, which in turn may or may not be linked with one another in nature. For example, a single string construct antigen includes multiple epitopes, which may be from different parts of the same HSV (e.g., HSV-1 and / or HSV-2) protein and / or from different HSV (e.g., HSV-1 and / or HSV-2) proteins, linked together as described herein in a single polypeptide.

[0401] Thus, a single pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) as described herein may comprise or deliver (e.g., because the pharmaceutical composition includes a nucleic acid, such as an RNA, that encodes the antigen and is expressed upon administration) a single antigen, which itself may comprise multiple epitopes (either in their natural arrangement relative to one another or in an engineered or constructed arrangement as described herein), or may comprise or deliver a plurality of antigens, each of which similarly may be or comprise a single epitope or multiple epitopes (either in their natural arrangement relative to one another or in an engineered or constructed arrangement as described herein). Still further, a single pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) may, for example, include multiple distinct nucleic acids (e.g., RNAs) that each encode different antigen(s) or, in some embodiments, may include a single nucleic acid that encodes (and expresses) multiple antigens. Yet further, a single pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) that includes multiple distinct nucleic acids (e.g., RNAs) encoding antigens may, in some embodiments be prepared by mixing the RNAs and then incorporating the mixture into LNPs, or alternatively by formulating individual RNAs into LNPs and then mixing the LNPs. In some embodiments, mixtures (whether of RNAs pre-LNP preparation or of LNPs) may include the relevant RNAs in 1:1 ratio, or in other ratios as may be preferred (e.g., to achieve a desired relative presentation of antigens or epitopes) in a subject to whom the composition is administered. Page 97 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0402] In some particular embodiments, a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) may comprise or deliver a combination comprising a polypeptide or fragment thereof encoded by all or part of UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, UL49, RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof.

[0403] In some embodiments, a provided composition includes or delivers an HSV (e.g., HSV-1 and / or HSV-2) envelope glycoprotein antigen (e.g., a full-length HSV (e.g., HSV-1 and / or HSV-2) envelope glycoprotein, a fragment thereof, or one or more epitopes thereof, for example in a string construct). In some embodiments, a provided composition includes or delivers such an HSV (e.g., HSV-1 and / or HSV-2) envelope glycoprotein antigen together with one or more B cell targets (e.g., epitopes) which may, for example, be or comprise one or more other HSV (e.g., HSV-1 and / or HSV-2) proteins (or fragments or epitopes thereof). In some embodiments, such a B cell target is or comprises an HSV (e.g., HSV-1 and / or HSV-2) protein (or fragment or epitope thereof) that is predicted or known to induce a B cell response in infected humans. For example, in some embodiments, a B cell target is or comprises an HSV (e.g., HSV-1 and / or HSV-2) protein (or fragment or B cell epitope thereof) against which sera from infected individual(s) is reactive. In some embodiments, a B cell target is or comprises an HSV (e.g., HSV-1 and / or HSV-2) envelope glycoprotein, or other relevant HSV (e.g., HSV-1 and / or HSV-2) protein, or a fragment or epitope thereof.

[0404] In some embodiments, a provided composition comprises or delivers a string construct antigen that includes a plurality of T cell epitopes, optionally from more than one HSV (e.g., HSV-1 and / or HSV-2) protein. In some such embodiments, a provided composition further comprises or delivers one or more B cell targets. Alternatively or additionally, in some embodiments, a string construct antigen so utilized includes HSV (e.g., HSV-1 and / or HSV-2) sequences (e.g., one or more fragments or epitopes, e.g., T cell epitopes and / or B cell epitopes, but in some embodiments specifically T cell epitopes).

[0405] In some embodiments, a string construct antigen includes both B cell epitopes and T cell epitopes (optionally from the same HSV (e.g., HSV-1 and / or HSV-2) protein or from different HSV (e.g., HSV-1 and / or HSV-2) proteins).

[0406] In some embodiments, different antigens may be delivered by administration of different compositions, which in turn may, in some embodiments, be administered at the same time (e.g., as an admixture or otherwise substantially simultaneously) and, in some embodiments, may be administered at different times. To give but one example, in some embodiments, a particular antigen or antigen(s) may be delivered via an initial pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) dose, and one or more other antigen(s) may be delivered via one or more booster dose(s). 2. Exemplary Multi-Epitope Antigens

[0407] In some embodiments, an antigen utilized (i.e., included in and / or otherwise delivered by) a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) described herein comprises multiple epitopes, e.g., of a single HSV (e.g., HSV-1 and / or HSV-2) protein or of multiple proteins.

[0408] In some embodiments, an antigen may comprise two or more epitopes from the same HSV (e.g., HSV-1 and / or HSV-2) protein and in their natural configuration relative to one another (e.g., in a fragment if the Page 98 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) relevant protein). In some embodiments, however, an antigen may comprise at least two epitopes configured in a non-natural relationship relative to one another (e.g., included in a string construct as described herein).

[0409] Among other things, the present disclosure provides an insight that string construct antigens may be particularly useful or effective for vaccination against an HSV (e.g., HSV-1 and / or HSV-2) infection. Without wishing to be bound by any particular theory, the present disclosure proposes that ability to link individual epitopes predicted or determined to have specific attributes – e.g., binding to relevant HLA alleles, expression at relevant times of infection, representation of particularly conserved sequences, potentially across a plurality of different HSV (e.g., HSV-1 and / or HSV-2) proteins, may prove uniquely beneficial, or indeed critical, for effective vaccination against HSV (e.g., HSV-1 and / or HSV-2), where more traditional vaccination approaches have thus far provided only limited protection.

[0410] In some embodiments, a multi-epitope antigen (e.g., a string construct antigen or a polyepitopic antigen) may be administered as a polypeptide and / or as a collection of peptides. Alternatively or additionally, a multi-epitope antigen may be administered as preparation of cells that comprise (e.g., express) the antigen. However, the present disclosure further provides an insight that, in some embodiments, delivery by administration of a nucleic acid, and particularly of an RNA, encoding the multi-epitope antigen, may be particularly useful and / or effective.

[0411] As noted elsewhere herein, experience with SARS-CoV-2 has demonstrated that RNA administration can be a particularly effective way to deliver an infectious disease antigen. Furthermore, the present disclosure provides an insight that various features of nucleic acid formats including, for example their flexibility and amenability to rapid design and modification, including incorporation of a variety of insights (e.g., bioinformatics inputs etc.), renders them particularly attractive for use in an HSV (e.g., HSV-1 and / or HSV-2) composition (e.g., an immunogenic composition, a vaccine). Among other things, the present disclosure provides an insight that, in some embodiments, administration of an RNA encoding a string construct antigen as described herein may be a particularly desirable and / or effective approach to immunizing against HSV (e.g., HSV-1 and / or HSV-2) infection.

[0412] In some embodiments, a “string” polynucleotide sequence encodes a plurality of antigens and / or epitopes in tandem. In some embodiments, a string encodes about 2 to about 100, about 2 to about 75, about 2 to about 50, about 2 to about 25, about 2 to about 20, about 2 to about 15, about 2 to about 10, or about 2 to about 5 antigens and / or epitopes. In some embodiments, a string encodes about 5 to about 100, about 5 to about 75, about 5 to about 50, about 5 to about 25, about 5 to about 20, about 5 to about 15, or about 5 to about 10 antigens and / or epitopes. In some embodiments, a “string” polynucleotide sequence encodes a plurality of epitopes in tandem. In some embodiments, a string encodes about 2 to about 1000 or about 2 to about 10,000 antigens and / or epitopes. In some embodiments about 2-5,000 antigens and / or epitopes are encoded in one polynucleotide string. In some embodiments, about 2-4,000 antigens and / or epitopes are encoded in one polynucleotide string. In some embodiments, about 2-3,000 antigens and / or epitopes are encoded in one polynucleotide string. In some embodiments about 2-2,000 antigens and / or epitopes are encoded in one polynucleotide string. In some embodiments, about 2-1,000 antigens and / or epitopes are encoded in one polynucleotide string. In some embodiments, about 10-500 antigens and / or epitopes are encoded in one polynucleotide string. In some Page 99 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) embodiments, about 10-200 antigens and / or epitopes are encoded in one polynucleotide string. In some embodiments, about 20-100 antigens and / or epitopes are encoded in one polynucleotide string.

[0413] In some embodiments, epitopes encoded by string constructs comprise epitopes that are predicted by an HLA binding and presentation prediction software to be of high likelihood to be presented by a protein encoded by an HLA to a T cell for eliciting immune response. In some embodiments, epitopes that are predicted to have a high likelihood to be presented by a protein encoded by an HLA, are selected from any one of the proteins or peptides described in Tables 3-5. In some embodiments, epitopes in a string construct comprise membrane- associated or otherwise accessible epitopes, e.g., at relevant time(s) during the HSV (e.g., HSV-1 and / or HSV-2) life cycle.

[0414] In some embodiments, an antigen utilized in accordance with the present disclosure an antigen is or comprises UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, UL49, RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof, and variants thereof and / or fragments or epitopes of any of the foregoing, and combinations of any of the foregoing. In some embodiments, an antigen utilized in accordance with the present disclosure an antigen is or comprises an HSV protein is or comprises an HSV envelope protein, an HSV tegument protein, an HSV membrane protein, and variants thereof and / or fragments or epitopes of any of the foregoing, and combinations of any of the foregoing. In some embodiments, a string construct may comprise a multitude of epitopes that are from 2, 3, 4, or more HSV proteins. In some embodiments a string constructs comprise one or more features described in herein, including the examples and tables. In some embodiments the String constructs comprise a sequence, or are encoded by a sequence, as depicted in Tables 3-5.

[0415] Alternatively or additionally, in some embodiments, one or more string constructs may include one or more other epitopes (e.g., as may be predicted or demonstrated, for example in literature). In some embodiments, a string construct may comprise sequences encoding features such as linkers, and cleavage sites (e.g., auto-cleavage sites such as, for example, T2A, or P2A sequences). In some embodiments, a linker that is enriched in G and S residues can be used. In some embodiments, an exemplary linker may have a sequence of GGGGSGGGGS (SEQ ID NO: 167) or GGSGGGGSGG (SEQ ID NO: 165).

[0416] In some embodiments, a string construct comprises two or more overlapping epitope sequences.

[0417] In some embodiments, a string construct comprises a sequence, or is encoded by a sequence, that is 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% sequence identity to any one of the sequences in Tables 3-5. As noted above, where sequences being compared are longer than about 20 amino acids, percent identity or homology is typically greater than about 80%; for sequences longer than about 50 amino acids, percent identity or homology is typically greater than about 90%.

[0418] In some embodiments, epitopes are arranged on a string to maximize immunogenicity of the string, for example by maximizing recognition by HLA allele repertoire of a subject. In some embodiments, the same string encodes epitopes that can bind to and / or are predicted to bind to different HLA alleles. For instance, as is well exemplified in the sequences tables, e.g., at least in Tables 3-5 a string may encode epitope(s) that comprise: (a) a Page 100 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) first epitope that binds to or is predicted to bind to a first MHC peptide encoded by a first HLA allele; (b) a second epitope that binds to or is predicted to bind to a second MHC peptide encoded by a second HLA allele; (c) a third epitope that binds to or is predicted to bind to a third MHC peptide encoded by a third HLA allele – and more such epitopes can be added, as in for example in string sequences as provided herein; wherein the first, second and third epitopes are epitopes from the same HSV (e.g., HSV-1 and / or HSV-2) protein, or from different HSV (e.g., HSV-1 and / or HSV-2) proteins. In this way, epitope distribution encoded by a single string is maximized for hitting the different MHC based presentation to T cells, thereby maximizing the probability of generating a desired immune response from a wider range of patients in the given population and the robustness of the response of each patient.

[0419] In some embodiments, epitopes included in a string construct are selected on the basis of high scoring prediction for binding to an HLA by a reliable prediction algorithm or system, such as the RECON prediction algorithm. In some embodiments, the present disclosure provides an insight that particularly successful strings can be provided by selecting epitopes based on highly reliable and efficient prediction algorithm, in the layout of the epitopes encoded by the string, with or without non-epitope sequences or sequences flanking the epitopes, and is such that the immunogenicity of the string is validated in an ex vivo cell culture model, or in an animal model, specifically in showing T cell induction following vaccination with a string construct or a polypeptide encoded by a string construct with the finding of epitope specific T cell response. In some embodiments, validation may be from using in human patients, and with a finding that T cells obtained from a patient post vaccination shows epitope specific efficient and lasting T cell response. In some embodiments, efficiency of a string as a composition (e.g., an immunogenic composition, a vaccine) is influenced by its design that in part depends on strength of the bioinformatics information used in the thoughtful execution of the design, the reliability of the MHC presentation prediction model, the efficiency of epitope processing when a string composition (e.g., an immunogenic composition, a vaccine) is expressed in a cell, among others.

[0420] In some embodiments a multi-epitopic RNA (e.g., mRNA) construct as described above comprises 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or more antigens and / or epitopes. In some embodiments, a pharmaceutical composition comprises 2, 3, 4, 5, 6, 7, 8, 9, or 10 or more strings. In some embodiments, a pharmaceutical composition comprises 6 strings. In some embodiments, a pharmaceutical composition comprises 7 strings. In some embodiments, a pharmaceutical composition comprises 8 strings. In some embodiments, a pharmaceutical composition comprises 9 strings. In some embodiments, a pharmaceutical composition comprises 10 strings.

[0421] In some embodiments, epitope-coding sequences in a string construct are flanked by one or more sequences selected for higher immunogenicity, better cleavability for peptide presentation to MHCs, better expression, and / or improved translation in a cell in a subject. In some embodiments, flanking sequences comprise a linker with a cleavable sequence. In some embodiments, epitope-coding sequences in a string construct are flanked by a secretory protein sequence.

[0422] In some embodiments, a string sequence encodes an epitope that may comprise or otherwise be linked to a secretory signal, such as those listed in Table 7, or at least a sequence having 1, 2, 3, 4, or 5 amino acid differences relative thereto. In some embodiments, a string sequence encodes an epitope that may comprise or otherwise be linked to a secretory signal such as MFVFLVLLPLVSSQCVNLT (SEQ ID NO: 90), or at least a sequence Page 101 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) having 1, 2, 3, 4, or at the most 5 amino acid differences relative thereto. In some embodiments, a string sequence encodes an epitope that may be linked at the N-terminal end by a sequence that is enriched in G and S residues, or a sequence having 1, 2, 3, 4, or at the most 5 amino acid differences relative thereto. In some embodiments, an exemplary linker that may be useful to link epitopes has a sequence of GGSGGGGSGG (SEQ ID NO: 165).

[0423] In some embodiments, linked sequences may comprise a linker with a cleavage sequence, e.g., with specific cleavable sequences.

[0424] In some embodiments, a string construct is linked to a transmembrane domain (TM) or other membrane-associating element. In some embodiments, a linker may have a length of 2, 3, 4, 5, 6, 7, 8, 9, 10 or more amino acid. In some embodiments, a linker of not more than about 30, 25, 20, 15, 10 or fewer amino acids is used. In some embodiments, a linker sequence is not limited to comprise any particular amino acids; in some embodiments, a linker sequence comprises any amino acids. In some embodiments, a linker or cleavage sequence comprises glycine (G). In some embodiments, a linker or cleavage sequence comprises serine (S). In some embodiments, a linker is designed to comprise amino acids based on a cleavage predictor to generate highly cleavable sequences peptide sequences and is a novel and effective way of delivering immunogenic T cell epitopes in a T cell composition (e.g., an immunogenic composition, a vaccine) setting.

[0425] In some embodiments, epitope distribution and their juxtaposition encoded in a string construct are so designed to facilitate cleavage sequences contributed by the amino acid sequences of the epitopes and / or the flanking or linking residues and thereby using minimal linker sequences. Some exemplary cleavage sequences, without limitation, may be one or more of FRAC, KRCF, KKRY, ARMA, RRSG, MRAC, KMCG, ARCA, KKQG, YRSY, SFMN, FKAA, KRNG, YNSF, KKNG, RRRG, KRYS, and ARYA (SEQ ID NOs: 62-79, respectively).

[0426] In some embodiments, a string construct is RNA (e.g., mRNA). In some embodiments, a pharmaceutical composition comprises one or more RNA (e.g., mRNA) string constructs, each comprising a sequence encoding a plurality of epitopes as described herein. In some embodiments, the one or more RNA (e.g., mRNA) comprises a plurality of epitopes, wherein each of the plurality of epitopes is predicted by an HLA binding and presentation prediction algorithm to be of high likelihood to be presented by a protein encoded by an HLA to a T cell for eliciting immune response.

[0427] In some embodiments, one or more RNAs (e.g., mRNAs) utilized in a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) as described herein encodes a plurality of epitopes (e.g., including one or more, or two or more, antigens provided in Table 4, Table 5, or Table 6, or fragments thereof or epitopes thereof), optionally wherein each of the plurality is predicted by an HLA binding and presentation prediction algorithm to be of high likelihood to be presented by a protein encoded by an HLA to a T cell for eliciting immune response. In some embodiments, the plurality of epitopes comprises epitopes from a single HSV (e.g., HSV-1 and / or HSV-2) protein. In some embodiments, the plurality of epitopes comprises epitopes from multiple HSV (e.g., HSV-1 and / or HSV-2) proteins.

[0428] In some embodiments, one or more RNAs (e.g., mRNAs) utilized in a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) as described herein include a first RNA that encodes an HSV (e.g., HSV-1, HSV-2 or both) antigen expressed prior to cell infiltration or infection and includes one or more fragments Page 102 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) expected or known to interface with host cytoplasm. In some embodiments, an HSV antigen encoded by a first RNA is or comprises an HSV antigen, fragment, or epitope, e.g., a UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, UL49, RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof, epitopes thereof, and / or a combination thereof. In some embodiments, one or more RNAs (e.g., mRNAs) utilized in a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) as described herein includes a second antigen RNA that encodes a multi-epitopic (e.g., polyepitopic) antigen. In some embodiments, a multi-epitopic antigen comprises two or more antigens found in Tables 3-5 herein, or fragments thereof or epitopes thereof. In some embodiments, a multi-epitopic antigen comprises two or more antigens listed in Tables 3-5, and / or fragments and / or epitopes thereof.

[0429] In some embodiments, one or more RNAs (e.g., mRNAs) utilized in a pharmaceutical composition (e.g., immunogenic composition, e.g., vaccine) as described herein includes a plurality of epitopes that are predicted by an HLA binding and presentation prediction algorithm to be of high likelihood to be presented by a protein encoded by an HLA to a T cell for eliciting immune response. In some embodiments, the plurality of epitopes comprises epitopes from a single HSV (e.g., HSV-1, HSV-2 or both) protein. In some embodiments, the plurality of epitopes comprises epitopes from multiple HSV (e.g., HSV-1 and / or HSV-2) proteins.

[0430] In some embodiments, an RNA (e.g., mRNA) comprises a 5’UTR and a 3’UTR. In some embodiments, an UTR comprises a poly A sequence. In some embodiments, a poly A sequence comprises between 50-200 nucleotides.

[0431] In some embodiments, epitopes encoded in a string construct may be flanked by a secretory signal (e.g., HSV-1 gD secretory signal, HSV-2 gD secretory signal, or a combination thereof).

[0432] In some embodiments, a polynucleotide comprises a dEarI-hAg sequence.

[0433] In some embodiments, a poly A tail of a string construct may comprise about 150 A residues. In some embodiments, a poly A tail may comprise 120 residues or less. In some embodiments, a poly A tail of a string construct may comprise about 120 A residues. In some embodiments, a poly A tail of a string construct may comprise about 100 residues. In some embodiments, a poly A tail of a string comprises a “split” or “interrupted” poly A tail (e.g., as described in WO2016 / 005324, which is incorporated herein by reference in its entirety).

[0434] In some embodiments, a multi-epitope antigen encodes a super-motif-bearing or motif-bearing polypeptide, together with a helper epitope (e.g., a heterologous helper epitope) and an endoplasmic reticulum- translocating signal sequence. See, for example, in An & Whitton J. Virol. 71:2292, 1997; Thomson. et al., J. Immunol. 157:822, 1996; Whitton, et al., J. Virol 67:348, 1993; Hanke, et al., Vaccine 16:426, 1998, each of which is incorporated herein by reference in its entirety. 3. T Cell Antigens and Related Constructs

[0435] In some embodiments, an HSV antigen construct can include and / or encode at least one T cell antigen (e.g., at least one CD4 and / or CD8 T cell antigen) for HSV selected from UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, UL49, RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one T cell antigen for HSV selected from UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, Page 103 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) and / or UL49 or fragments thereof. In some embodiments, an HSV antigen construct can include and / or encode at least one T cell antigen for HSV selected from RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof.

[0436] In some embodiments, an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, or 19) T cell antigens (e.g., CD4 and / or CD8 T cell antigens) for HSV selected from UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, UL49, RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof. In some embodiments, a polyribonucleotide and / or an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10) T cell antigens for HSV selected from UL1, UL21, UL27, UL29, UL39, UL40, UL46, UL47, UL48, and / or UL49 or fragments thereof. In some embodiments, a polyribonucleotide and / or an HSV antigen construct can include and / or encode a plurality of (e.g., 1, 2, 3, 4, 5, 6, 7, 8, or 9) T cell antigens for HSV selected from RS1, RL2, UL5, UL9, UL19, UL25, UL30, UL52, US1, US7, US8, UL22, US10, US12, UL26, UL50, and / or UL54 or fragments thereof.

[0437] In some embodiments, a polyribonucleotide according to the present disclosure encodes a polypeptide that comprises two or more HSV antigens or antigenic fragments. In some embodiments, two or more HSV antigenic fragments are each a fragment of a different HSV antigen. In some embodiments, at least two of the HSV antigenic fragments are a fragment from the same HSV antigen.

[0438] In some embodiments, a polyribonucleotide encoding a polypeptide, wherein the polypeptide comprises three or more HSV antigens or antigenic fragments thereof. In some embodiments, three or more HSV antigenic fragments are each a fragment of a different HSV antigen. In some embodiments, at least two out of three of the HSV antigenic fragments are a fragment from the same HSV antigen.

[0439] In some embodiments, a polyribonucleotide encoding a polypeptide, wherein the polypeptide comprises four or more HSV antigens or antigenic fragments thereof. In some embodiments, four or more HSV antigenic fragments are each a fragment of a different HSV antigen. In some embodiments, at least two out of four of the HSV antigenic fragments are a fragment from the same HSV antigen.

[0440] In some embodiments, a polyribonucleotide encoding a polypeptide, wherein the polypeptide comprises five or more HSV antigens or antigenic fragments thereof. In some embodiments, five or more HSV antigenic fragments are each a fragment of a different HSV antigen. In some embodiments, at least two out of five of the HSV antigenic fragments are a fragment from the same HSV antigen.

[0441] In some embodiments, a polyribonucleotide encoding a polypeptide, wherein the polypeptide comprises six or more HSV antigens or antigenic fragments thereof. In some embodiments, six or more HSV antigenic fragments are each a fragment of a different HSV antigen. In some embodiments, at least two out of six of the HSV antigenic fragments are a fragment from the same HSV antigen.

[0442] In some embodiments, a polypeptide according to the present disclosure does not comprise a full- length HSV antigen.

[0443] In some embodiments, a polypeptide according to the present disclosure comprises one or more HSV antigens or antigenic fragments thereof that comprise one or more T cell antigens. Page 104 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01)

[0444] In some embodiments, one or more HSV antigens or antigenic fragments thereof have at least 80% sequence identity with one or more sequences selected from SEQ ID NOs: 1-74, 260-270, or a corresponding fragment thereof.

[0445] In some embodiments, an HSV T cell antigen is or includes a UL1 polypeptide or fragment thereof. In various embodiments, a UL1 polypeptide or fragment thereof has at least 80% sequence identity with a UL1 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof. In some embodiments, a UL1 polypeptide or fragment thereof has at least 80%, such as at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 99%, or 100% sequence identity with a UL1 amino acid sequence set forth in Table 3 or otherwise known in the art, or a corresponding fragment thereof. Examples of UL1 polypeptides known in the art include UL1 polypeptides encoded by known HSV strains such as, without limitation, HG52, G, 333, and MS strains. In some embodiments, a UL1 polypeptide or fragment thereof has at least 80%, su...

Claims

Attorney Docket No.: 2013237-1142 (P1609WO01) CLAIMS What is claimed is:

1. A polyribonucleotide encoding a polypeptide, wherein the polypeptide comprises one or more herpes simplex virus (HSV) antigens or antigenic fragments thereof, and wherein the one or more HSV antigens or antigenic fragments thereof comprise: (i) one or more HSV RS1 polypeptides or antigenic fragments thereof, (ii) one or more HSV RL2 polypeptides or antigenic fragments thereof, (iii) one or more HSV UL1 polypeptides or antigenic fragments thereof, (iv) one or more HSV UL5 polypeptides or antigenic fragments thereof, (v) one or more HSV UL9 polypeptides or antigenic fragments thereof, (vi) one or more HSV UL19 polypeptides or antigenic fragments thereof, (vii) one or more HSV UL21 polypeptides or antigenic fragments thereof, (viii) one or more HSV UL25 polypeptides or antigenic fragments thereof, (ix) one or more HSV UL27 polypeptides or antigenic fragments thereof, (x) one or more HSV UL29 polypeptides or antigenic fragments thereof, (xi) one or more HSV UL30 polypeptides or antigenic fragments thereof, (xii) one or more HSV UL39 polypeptides or antigenic fragments thereof, (xiii) one or more HSV UL40 polypeptides or antigenic fragments thereof, (xiv) one or more HSV UL46 polypeptides or antigenic fragments thereof, (xv) one or more HSV UL47 polypeptides or antigenic fragments thereof, (xvi) one or more HSV UL48 polypeptides or antigenic fragments thereof, (xvii) one or more HSV UL49 polypeptides or antigenic fragments thereof, (xviii) one or more HSV UL52 polypeptides or antigenic fragments thereof, (xix) one or more HSV UL54 polypeptides or antigenic fragments thereof, (xx) one or more HSV US10 polypeptides or antigenic fragments thereof, (xxi) one or more HSV US12 polypeptides or antigenic fragments thereof, (xxii) one or more HSV UL26 polypeptides or antigenic fragments thereof, (xxiii) one or more HSV UL50 polypeptides or antigenic fragments thereof, or (xxiv) a combination thereof.

2. The polyribonucleotide of claim 1, wherein the polypeptide comprises one or more HSV antigenic fragments, and the one or more HSV antigenic fragments comprise: (i) one or more HSV RS1 polypeptide antigenic fragments, (ii) one or more HSV RL2 polypeptide antigenic fragments, (iii) one or more HSV UL1 polypeptide antigenic fragments, (iv) one or more HSV UL5 polypeptide antigenic fragments, (v) one or more HSV UL9 polypeptide antigenic fragments, (vi) one or more HSV UL19 polypeptide antigenic fragments, (vii) one or more HSV UL21 polypeptide antigenic fragments, Page 346 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) (viii) one or more HSV UL25 polypeptide antigenic fragments, (ix) one or more HSV UL27 polypeptide antigenic fragments, (x) one or more HSV UL29 polypeptide antigenic fragments, (xi) one or more HSV UL30 polypeptide antigenic fragments, (xii) one or more HSV UL39 polypeptide antigenic fragments, (xiii) one or more HSV UL40 polypeptide antigenic fragments, (xiv) one or more HSV UL46 polypeptide antigenic fragments, (xv) one or more HSV UL47 polypeptide antigenic fragments, (xvi) one or more HSV UL48 polypeptide antigenic fragments, (xvii) one or more HSV UL49 polypeptide antigenic fragments, (xviii) one or more HSV UL52 polypeptide antigenic fragments, (xix) one or more HSV UL54 polypeptide antigenic fragments, (xx) one or more HSV US10 polypeptide antigenic fragments, (xxi) one or more HSV US12 polypeptide antigenic fragments, (xxii) one or more HSV UL26 polypeptide antigenic fragments, (xxiii) one or more HSV UL50 polypeptide antigenic fragments, or (xxiv) a combination thereof.

3. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV RL2 polypeptides or antigenic fragments thereof, one or more HSV RS1 polypeptides or antigenic fragments thereof, and one or more HSV UL54 polypeptides or antigenic fragments thereof.

4. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL49 polypeptides or antigenic fragments thereof, and one or more HSV UL9 polypeptides or antigenic fragments thereof.

5. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL30 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, and one or more HSV UL52 polypeptides or antigenic fragments thereof.

6. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL1 polypeptides or antigenic fragments thereof, one or more HSV UL19 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, one or more HSV UL27 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more UL48 polypeptides or antigenic fragments thereof, and one or more HSV UL25 polypeptides or antigenic fragments thereof. Page 347 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 7. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV US1 polypeptides or antigenic fragments thereof, one or more HSV US8 polypeptides or antigenic fragments thereof, one or more HSV US12 polypeptides or antigenic fragments thereof, one or more HSV UL50 polypeptides or antigenic fragments thereof, one or more HSV UL26 polypeptides or antigenic fragments thereof, and one or more HSV US10 polypeptides or antigenic fragments thereof.

8. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV RL2 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, and one or more HSV UL21 polypeptides or antigenic fragments thereof.

9. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL9 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, and one or more HSV UL30 polypeptides or antigenic fragments thereof.

10. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV RL2 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, one or more HSV UL9 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, and one or more HSV UL5 polypeptides or antigenic fragments thereof.

11. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL30.1 polypeptides or antigenic fragments thereof, and one or more HSV UL29 polypeptides or antigenic fragments thereof.

12. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV RL2.1 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, and one or more HSV UL46 polypeptides or antigenic fragments thereof.

13. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV RL2.1 polypeptides or antigenic fragments thereof, one or more HSV RS1 polypeptides or antigenic fragments thereof, and one or more HSV UL54 polypeptides or antigenic fragments thereof. Page 348 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 14. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, and one or more HSV UL9 polypeptides or antigenic fragments thereof.

15. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL5.1 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, and one or more HSV UL30.1 polypeptides or antigenic fragments thereof.

16. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, and one or more HSV UL21 polypeptides or antigenic fragments thereof.

17. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL9 polypeptides or antigenic fragments thereof, one or more HSV UL5.1 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, and one or more HSV UL30.1 polypeptides or antigenic fragments thereof.

18. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV RL2.1 polypeptides or antigenic fragments thereof, one or more HSV RS1 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, and one or more HSV UL21 polypeptides or antigenic fragments thereof.

19. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises one or more HSV UL5.1 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL30.1 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, and one or more HSV UL21 polypeptides or antigenic fragments thereof.

20. The polyribonucleotide of any one of claims 1 to 3, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more RL2 polypeptides or antigenic fragments thereof, one or more RS1 polypeptides or antigenic fragments thereof, one or more UL54 polypeptides or antigenic fragments thereof, and a MITD.

21. The polyribonucleotide of any one of claims 1-3, and 20, wherein the polypeptide comprises, in N-terminus to C-terminus order, an HSV-1 gD secretory signal, an UL54 polypeptide or antigenic fragment thereof, a linker, an Page 349 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) RS1 polypeptide or antigenic fragment thereof, a linker, an RL2 polypeptide or antigenic fragment thereof, a linker, a RL2 polypeptide or antigenic fragment thereof, a linker, and a MITD.

22. The polyribonucleotide of any one of claims 1, 2, and 4, wherein the polypeptide comprises an HSV-1 gD secretory signal, an UL29 polypeptide or antigenic fragment thereof, a linker, an UL39 polypeptide or antigenic fragment thereof, a linker, an UL49 polypeptide or antigenic fragment thereof, a linker, a UL9 polypeptide or antigenic fragment thereof, and a linker.

23. The polyribonucleotide of any one of claims 1, 2, and 5, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL30 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, one or more HSV UL52 polypeptides or antigenic fragments thereof, and a MITD.

24. The polyribonucleotide of any one of claims 1, 2, and 6, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL1 polypeptides or antigenic fragments thereof, one or more HSV UL19 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, one or more HSV UL27 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more UL48 polypeptides or antigenic fragments thereof, one or more HSV UL25 polypeptides or antigenic fragments thereof, and a MITD.

25. The polyribonucleotide of any one of claims 1 to 3, wherein the polypeptide comprises an HSV-2 gD secretory signal, one or more RL2 polypeptides or antigenic fragments thereof, one or more RS1 polypeptides or antigenic fragments thereof, one or more UL54 polypeptides or antigenic fragments thereof, and a MITD.

26. The polyribonucleotide of any one of claims 1, 2, and 7, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV US1 polypeptides or antigenic fragments thereof, one or more HSV US8 polypeptides or antigenic fragments thereof, one or more HSV US12 polypeptides or antigenic fragments thereof, one or more HSV UL50 polypeptides or antigenic fragments thereof, one or more HSV UL26 polypeptides or antigenic fragments thereof, and one or more HSV US10 polypeptides or antigenic fragments thereof, and a MITD.

27. The polyribonucleotide of any one of claims 1 to 3, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more RL2 polypeptides or antigenic fragments thereof, one or more RS1 polypeptides or antigenic fragments thereof, one or more UL54 polypeptides or antigenic fragments thereof, and an HSV-1 gD transmembrane region.

28. The polyribonucleotide of any one of claims 1 to 3, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more RL2 polypeptides or antigenic fragments thereof, one or more RS1 polypeptides or antigenic fragments thereof, one or more UL54 polypeptides or antigenic fragments thereof, and a VSV-G transmembrane region. Page 350 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 29. The polyribonucleotide of any one of claims 1-2 and 8, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV RL2 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, and a MITD.

30. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL9 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL30 polypeptides or antigenic fragments thereof, and a MITD.

31. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV RL2 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, one or more HSV UL9 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL5 polypeptides or antigenic fragments thereof, and a MITD.

32. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL30.1 polypeptides or antigenic fragments thereof, one or more HSV UL29 polypeptides or antigenic fragments thereof, and a MITD.

33. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV RL2.1 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, and a MITD.

34. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV RL2.1 polypeptides or antigenic fragments thereof, one or more HSV RS1 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, and a MITD.

35. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, and one or more HSV UL9 polypeptides or antigenic fragments thereof, and a MITD. Page 351 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) 36. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL5.1 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL30.1 polypeptides or antigenic fragments thereof, and a MITD.

37. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, and a MITD.

38. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, one or more HSV UL29 polypeptides or antigenic fragments thereof, one or more HSV UL39 polypeptides or antigenic fragments thereof, one or more HSV UL9 polypeptides or antigenic fragments thereof, one or more HSV UL5.1 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL30.1 polypeptides or antigenic fragments thereof, and a MITD.

39. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, comprises one or more HSV RL2.1 polypeptides or antigenic fragments thereof, one or more HSV RS1 polypeptides or antigenic fragments thereof, one or more HSV UL54 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, and a MITD.

40. The polyribonucleotide of claim 1 or 2, wherein the polypeptide comprises an HSV-1 gD secretory signal, comprises one or more HSV UL5.1 polypeptides or antigenic fragments thereof, one or more HSV UL5.2 polypeptides or antigenic fragments thereof, one or more HSV UL40 polypeptides or antigenic fragments thereof, one or more HSV UL30.1 polypeptides or antigenic fragments thereof, one or more HSV UL47 polypeptides or antigenic fragments thereof, one or more HSV UL46 polypeptides or antigenic fragments thereof, one or more HSV UL21 polypeptides or antigenic fragments thereof, and a MITD.

41. A combination comprising: a first polyribonucleotide according to any one of claims 1-40, and a second polyribonucleotide, wherein the second polyribonucleotide encodes a second polypeptide, wherein the second polypeptide comprises one or more herpes simplex virus (HSV) antigens or antigenic fragments thereof, and wherein the first polyribonucleotide and the second polyribonucleotide are different.

42. A combination comprising: a first pharmaceutical composition comprising a first polyribonucleotide, wherein the first polyribonucleotide is a polyribonucleotide according to any one of claims 1-40; and Page 352 of 354 12199844v1Attorney Docket No.: 2013237-1142 (P1609WO01) a second pharmaceutical composition comprising a second polyribonucleotide, wherein the polyribonucleotide encodes a second polypeptide, wherein the second polypeptide comprises one or more herpes simplex virus (HSV) antigens or antigenic fragments thereof, wherein the first polyribonucleotide and the second polyribonucleotide are different.

43. An RNA construct comprising in 5' to 3' order: (i) a 5' UTR; (ii) a polyribonucleotide of any one of claims 1-40; (iii) a 3' UTR; and (iv) a polyA tail sequence.

44. A composition comprising: (i) one or more polyribonucleotides of any one of claims 1-40, a combination of claim 41 or 42, or one or more RNA constructs of claim 43, and (ii) lipid nanoparticles, polyplexes (PLX), lipidated polyplexes (LPLX), or liposomes, wherein the one or more polyribonucleotides are fully or partially encapsulated within the lipid nanoparticles, polyplexes (PLX), lipidated polyplexes (LPLX), or liposomes.

45. A pharmaceutical composition comprising one or more polyribonucleotides of any one of claims 1-40, a combination of claim 41 or 42, or one or more RNA constructs of claim 43 and at least one pharmaceutically acceptable excipient.

46. A method comprising administering a polyribonucleotide according to any one of claims 1-40, a combination according to claim 41 or 42, an RNA construct according to claim 43, or a pharmaceutical composition according to claim 45 to a subject. Page 353 of 354 12199844v1

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