Fig. 3.

A9E and G9E reactivity in a flavivirus endemic population. (a and b) Correlation between ZIKV eFRNT50 and A9E %BOB and G9E %BOB. For c and d, FRNT50 titres were available for n = 34 samples. The correlation coefficient and the p value from the simple linear regression are displayed in the upper right of each panel. (c and d) A9E and G9E %BOB grouped by flavivirus immune status as determined by FRNT and eFRNT testing for the Colombia AIP samples, a cross-sectional surveillance set of pregnant women in Risaralda, Colombia (n = 92). Each panel is divided into two adjoined panes corresponding to ZIKV immune status, using a cut-off of FRNT50 = 200. Dotted lines represent positivity threshold for A9E and G9E determined by ROC analysis.