Fig. 5From: Malaria in pregnancy: a passive surveillance study of pregnant women in low transmission areas of Colombia, Latin AmericaAntibody response against P. vivax antigens in women with two malaria episodes by P. vivax. Antibody response against (a) PvCS and (b) PvMSP-1 was determined by ELISA. Values are expressed as reactivity index (RI) defined as sample OD at 1:200 serum dilutions divided by the cut-off value. Statistical differences between both episodes were calculated using the Wilcoxon signed rank testBack to article page