Overview

The mosquito that carries Zika virus is found worldwide.

Stay up-to-date on virus disease cases on the CDC's Zika virus disease website.

Zika (Zee-ka) virus disease is a mosquito-borne viral infection that primarily occurs in tropical and subtropical areas of the world. Most people infected with Zika virus have no signs and symptoms, while others report mild fever, rash and muscle pain. Other signs and symptoms may include headache, red eyes (conjunctivitis) and a general feeling of discomfort.

Zika virus infections during pregnancy have been linked to miscarriage and can cause microcephaly, a potentially fatal congenital brain condition. Zika virus also may cause other neurological disorders such as Guillain-Barre syndrome.

Researchers are working on a Zika virus vaccine. For now the best prevention is to prevent mosquito bites and reduce mosquito habitats.

Aug. 23, 2017
References
  1. AskMayoExpert. Zika. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2016.
  2. Schuler-Faccini L, et al. Possible association between Zika virus infection and microcephaly – Brazil, 2015. The Morbidity and Mortality Weekly Report. 2016;65:59.
  3. Ayres CFJ. Identification of Zika virus vectors and implications for control. The Lancet. In press. Accessed Feb. 12, 2016.
  4. Zika virus. The Centers for Disease Control and Prevention. http://www.cdc.gov/zika/index.html. Accessed Feb. 12, 2016.
  5. Recommendations for donor screening, deferral, and product management to reduce the risk of transfusion-transmission of Zika virus. U.S. Food and Drug Administration. http://www.fda.gov/downloads/BiologicsBloodVaccines/GuidanceComplianceRegulatoryInformation/Guidances/Blood/UCM486360.pdf?elq_cid=1276914&x_id=&elqTrackId=3c05e939c7654e97b748609b4507885e&elq=e87e12610c974fa0a1191639391fedae&elqaid=49412&elqat=1&elqCampaignId=21484. Accessed Feb. 18, 2016.
  6. Rasmussen SA, et al. Zika virus and birth defects – Reviewing the evidence for causality. New England Journal of Medicine. http://www.nejm.org. Accessed April 15, 2016.