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Correlation between prechallenge antibody titers and levels of parasitemia and those at day 35 postchallenge. (a) Mean level of parasitemia; (b) peak level of parasitemia; (c) cumulative level of parasitemia. The level of parasitemia is given as the number (103) of parasites per microliter. r, Pearson's correlation coefficient; PC, prechallenge.
