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Stratification of measured plasma cytokine levels by age among S. haematobium-infected participants (N = 99): (A) Mean interleukin-10 (IL-10) titres by age groups; (B) Mean IL-5 titres by age groups; (C) Mean IL-4 titres by age groups and (D) Mean IL13 titres by age groups. Error bars represent the standard error of mean (SEM).
