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Opsonizing antibodies are influenced by concurrent P. falciparum infection. Phagocytosis responses for each parasite strain were stratified by the density of P. falciparum infection at baseline. Infection was detected by PCR (A) or microscopy (B) or by PCR in children where infection was not detected by microscopy (C). Median values are shown, with differences assessed using a Wilcoxon rank sum test (*, P < 0.05; **, P < 0.01, ***, P < 0.001; ns, not significant).
