The present disclosure provides combinations of immunotherapeutics and methods for treating medical conditions that are characterized by the lack of an effective immune response, for example as would result following a down-regulation of 
MHC class I, such as in 
cancer. The immunotherapeutic compositions of the invention, which can be used to treat the medical conditions, include one or more immunostimulatory antibodies or molecules having specificity for CTLA-4, PD-1, PD-L1, PD-L2, CD40, OX40, CD137, GITR, ILT2, or ILT3, or ligands for these molecules (e.g., an isolated fully-human 
monoclonal antibody) in association with one or more alloantigens, such as, vector(s) capable of expressing 
protein(s) or 
peptide(s) that stimulate T-
cell immunity against tissues or cells, formulated in a pharmaceutically acceptable carrier. The proteins or peptides may comprise class I 
major histocompatibility complex (MHC) antigens, β2-microglobulins, or cytokines. The MHC 
antigen may be foreign to the subject. The MHC 
antigen may be HLA-B7.