Up to 1 in 20 babies born to mothers with Zika have birth defects, report says

The Zika virus is still spreading locally in some areas, including Puerto Rico. As many as one in 20 babies born to mothers infected by Zika have birth defects, a new report from by US Centers for Disease Control and Prevention shows. The risk jumped to nearly one in 13 when mothers were found to have Zika in the first trimester, the CDC stated.