Zika infections have been confirmed in nine pregnant women in the United States, including one who gave birth to a baby with a rare birth defect, health officials said Friday.
The Centers for Disease Control and Prevention said it’s investigating 10 more reports of pregnant travelers with Zika. All got the virus while visiting or living in places with Zika outbreaks.
Also on Friday, the CDC issued a caution to people planning to attend the Olympics this summer in Rio de Janeiro.
The U.S. cases add to reports out of Brazil. Officials there are exploring a possible link to babies born with unusually small heads, a rare birth defect called microcephaly, which can signal underlying brain damage.