Mice were immunized intramuscularly at day 0 with adenovirus in PBS at the dose corresponding to their group. Mice were then boosted subcutaneously at days 30 and 60 with 20 μg of the P. yoelii chimeric multistage protein (PyCMP) emulsified in Montanide ISA 51 VG in a 1:1 volume ratio. Control group mice received no immunizations. (n = 10 per group). Mice were bled for analysis of antibody titers via ELISA 20 days after each immunization. PBMCs were obtained from mouse whole blood samples at days 10, 20, 40, 50, and 70 post priming and were processed for flow cytometry.