A New York City woman has infected her male partner with the Zika virus through sex, the first time female-to-male transmission has been documented.
Zika is spread by mosquitoes, and health officials know that men can spread it through sex. The Centers for Disease Control and Prevention is now advising pregnant women to use protection if their sex partner has traveled to a Zika-infected region, whether the partner is a man or a woman. The Zika virus causes only a mild illness, at worst, in most people. But infection during pregnancy can lead to severe brain-related birth defects. The New York woman was not pregnant.