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Age-specific prevalence of antibodies to the surface of trophozoite-infected (T) (solid bars) and gametocyte-infected (G) (empty bars) RBCs for three P. falciparum isolates, Muz 37 (a), Muz 106 (b), and 1776 (c). Each age group contained 10 individuals, except for the 2-to-4 group, with 7, and the 5-to-9 group, with 12.
