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Prevalence of arthralgia by months post-chikungunya virus infection estimated by median cohort age (A), circulating viral genotype (B), study follow-up method (C), and region (D). The colored points and lines indicate the reported mean prevalence of arthralgia and 95% binomial confidence intervals. The colored lines and ribbon show the mean and 95% confidence interval for expected arthralgia prevalence estimated across studies by group.
