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. 2011 Jul 12;6(7):e21116. doi: 10.1371/journal.pone.0021116

Figure 3. The relationship of EV71 neutralizing antibodies levels/seropositivity and age.

Figure 3

Shown in A are age-specific seroprevalence to EV71 of Ho Chi Minh City, Viet Nam. The number above each bar shows the proportion of participants with detectable EV71 Neut-Ab in their plasma. Shown in B are levels of Neut-Ab in relation to age amongst those that are positive. The levels of Neut-Ab against EV71 in infants at 12 month-old were significantly higher than that in 24 m children (P = 0.0015), in 5–15 yrs group and 18–38 yrs group (P<0.0001) (Mann-Whitney U test). Noted that 18–38 yrs refers to cord blood. Data are shown as medians (5–95% percentile range). The dashed line represents the assay limit of detection.