Micaela Delgado is a beautiful dark-eyed baby girl with a ready smile. She's 8 months old. She's one of more than 1,000 babies already born in Puerto Rico to mothers with Zika.
Her mother, Yalieth Gonzalez, 22, says despite all her worries, so far Micaela's development appears normal. "She's very active, she's up on her own now, she's crawling," Gonzalez says. "She's saying, 'mama' and 'papa' already. She's a very happy baby. She has a lot of energy." But Gonzalez is on alert for signs of trouble.