Support WBURHow Zika Became So Dangerous For BabiesPlay02:44Download AudioMichaeleen DoucleffSeptember 28, 2017 ShareTwins Heloisa (left) and Heloa Barbosa, both born with microcephaly, had a one-year birthday party on April 16 in Areia, Brazil. Their mother says she contracted the Zika virus during pregnancy. (Getty Images)
