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Course of parasitaemia in immunized mice after being challenged with 1 × 106P. berghei parasitized red blood cells. Parasitaemia is expressed as means ± standard deviations. Asterisk: Control versus vaccinated (43 kDa + Saponin, 48 kDa + Saponin mice) on day 9; Space: 43 kDa + Saponin versus 48 kDa + Saponin, P < 0.001 on day 13
