Zika is a virus spread mostly by mosquitoes. For most people it is a mild infection with few or no symptoms. But it has been linked to health problems in some people, and it is a serious concern for pregnant women and their partners because it can cause serious birth defects. Zika virus can be passed from one person to another through sexual contact or blood. Zika is not spread from person to person by casual contact.
There have been several outbreaks of Zika virus in Central and South America and Puerto Rico. In the U.S., no mosquitoes have yet been found carrying the virus. The only cases in the U.S. are in people who got the virus while traveling to Zika-affected areas, or through sexual transmission from someone who had traveled there. Public health officials are working hard to learn more about Zika. In the meantime, they are strongly encouraging people to avoid mosquito bites and to control mosquito populations to help make sure Zika doesn't become widespread in the U.S.
Right now, there is no vaccine to prevent Zika.
Frequently Asked Questions
Zika Information Line
- 1-888-364-4723 - Monday – Friday (9 a.m. to 5 p.m.)
Information for the Public
- Zika Virus Testing Fact Sheet (PDF, 89KB). Also available in: Spanish, Italian, Korean, Portuguese, Russian, Chinese, Haitian Creole
- Mosquito Bite Prevention for Travelers (PDF, 210KB). Also available in: Spanish, Italian, Korean, Portuguese, Russian, Chinese, Haitian Creole
- Pregancy Travel Advisory (color) (PDF, 2MB). Also available in: Spanish, Italian, Korean, Portuguese, Russian, Chinese, Haitian Creole
- Mosquitoes and Disease
- Guidance when using Mosquito Dunks ® (larvicide) (PDF, 557KB)