Fig. 3: EV-A71 geometric mean titres (GMT) with age and probability of returning to be susceptible to EV-A71.

a GMT for all study participants in Children and Neonates cohort. Dots and line represent observed and predicted GMT, respectively; error bars and shadow represent 95% CI. b GMT in the seropositive participants, excluding maternal antibody titres. Dots and line represent observed and predicted GMT, respectively; error bars and shadow represent 95% CI. c Kaplan–Meier plot of the probability of loss of immunity in participants who were infected. Note: the sample size of panel a and panel b was listed in Supplementary Table 9.