Risk of Zika virus-associated birth defects in congenital confirmed cases in the Brazilian Amazon
Objective.
To establish the risk of microcephaly in neonates born to women infected with ZIKV during pregnancy.
Methods.
A cohort of laboratory-confirmed ZIKV cases of congenital infections (109 mothers infected during pregnancy and 101 newborns) among 308 suspect cases was followed in Belem, Pará, Brazil, from October 2015 to December 2017.

