The prevalence of microcephaly was significantly higher when compared with the previous period. The system had the capacity to detect five cases with congenital ZIKV syndrome in a country with limited viral circulation.
The characteristics of cases reported to the RENAC are similar to those already reported in the literature. The differences in prevalence between the RENAC and other surveillance systems could be artifactual or real. We confirmed the decrease of prevalence of NTDs after folic acid fortification.
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