Fig. 1

Case counts of perinatal DENV and/or ZIKV IgM + by municipality, Ahuachapan (left) and Sonsonate (right) departments. Municipalities with the highest DENV and/or ZIKV IgM + were found in Acajutla, Izalco, and Sonsonate (N = 7). *Municipalities colored in white indicate no participants from the original study stemmed from these areas; therefore no data was available