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Antibody response after CHIKV infection. Serum pools (n = 170) of anti–CHIKV-IgG–positives samples from various age-groups were evaluated for (A) anti–CHIKV-IgG titers. Data are presented as average ± standard error of mean. (B) Area under the curve of serum dilutions for each age-group. Levels of significance are presented as *P < 0.05, ** = P < 0.01, and *** = P < 0.001. CHIKV = chikungunya virus.
