Systems, compositions, devices, methods, etc., provide improved anti-
malaria immunological responses comprising making, providing and administering vaccines comprising specific
RNA molecules such as self-replicating
replicon RNA (repRNA) encoding proteins from Plasmodium such as the P. yoelii (Py) CS
protein (CSP), including in some embodiments substantially target proteins encoding target antigens, for example a whole or substantially whole CSP in the repRNA. The prime-and-trap intervals for the administration of the vaccine can comprise administration of only a single
dose of a repRNA-Non-encapsulating oil-in-water
emulsion nanocarriers (e.g., LION™) component followed by administration of as few as 3 or 2 doses, or even just a single
dose, of the WO component (e.g., RAS or genetically attenuated WO) at 0 day (same day), or 1, 2, 3, 4, 5, 10, 14, 15 days or 28 days later.