FILE - In this Dec. 16, 2016 file photo, Puerto Rico resident Michelle Flandez caresses her two-month-old son, Inti Perez, diagnosed with microcephaly linked to the mosquito-borne Zika virus, in Bayamon, Puerto Rico. According to a report released Thursday, June 8, 2017, on the impact of Zika virus in Puerto Rico and other U.S. territories, about 1 in 20 Zika-infected pregnant women had babies with birth defects. (AP Photo/Carlos Giusti)