Zika virus is transmitted to people primarily through the bite of an infected mosquito. The type of mosquito that most often carries this virus is found in Central and South America, including Mexico, Puerto Rico and other islands in the Caribbean, as well as some areas of the southern U.S. Zika virus is not currently circulating in the U.S. but has been detected in returning travelers.
Symptoms normally start 3–7 days after being bitten by an infected mosquito. Common symptoms include fever, joint soreness, rash or red eyes. Many people may not experience any symptoms.
Health officials are concerned about reports of microcephaly (abnormally small heads) in infants related to Zika virus infection during pregnancy. Reports of Guillain-Barre syndrome are also being investigated.
Information about Zika virus
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