AdvertisementHow Zika Became So Dangerous For Babies02:44Download AudioResumeSeptember 28, 2017Michaeleen DouclefffacebookEmailTwins 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. (Mario Tama/Getty Images)
