Figure 3From: Longitudinal analysis of antibody responses to trachoma antigens before and after mass drug administration Difference in individual IgG and IgA responses by age 6 months post-drug treatment. DBS were taken prior to drug treatment with azithromycin and 6 months afterwards. IgG and IgA levels were measured by Luminex multiplex assay and data from paired samples were plotted using GraphPad Prism. Lines connect paired samples from the same individual.Back to article page