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ROC plots of serology ELISA data for confirmed cases (positives) and noncases (negatives) with serum drawn ≥14 days after rash onset for IgG and >4 days to ≤78 days after rash onset for IgM. The x axis and the y axis represent the sensitivity (□) and the specificity (▪) of the ELISA, respectively. (A) ROC plot for IgG ELISA; (B) ROC plot for IgM ELISA.
