Fig. 2From: Comparative analysis of IgG and IgG subclasses against Plasmodium falciparum MSP-119 in children from five contrasting bioecological zones of CameroonOverall variation of antibody levels to MSP-119 with age in the study population. The line shows the LOESS smoothed estimate of the geometric mean. Evidence shows that total IgG (a) and IgG1–4 (b) levels increased with increasing age adjusting for gender and study site (p < 0.0001)Back to article page