Figure 2From: Longitudinal analysis of antibody responses to trachoma antigens before and after mass drug administration Age prevalence curve of IgG and IgA responses at baseline. DBS were collected from participants and analyzed for IgG and IgA levels by Luminex multiplex assay. Seroprevalence (% antibody positive/total) was plotted against age. Blue closed circles show% positive to both pgp3 and CT694 antigens; green open circles show% positive to pgp3 but not CT694; purple open circles show% positive to CT694 but not pgp3; and red closed circles show% positive to any antigen.Back to article page