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Zika Virus

What is Zika virus?

Zika virus is a mosquito-borne virus that can make humans sick.

How can I get Zika virus?

Zika virus is transmitted through the bite of an infected mosquito. Mosquitoes infected with Zika virus are currently found in areas of Africa, Asia, the Pacific Islands, and most recently, South and Central America and Mexico. Zika may also be transmitted between partners of any gender during sex, and from a mother to her unborn baby during pregnancy.

What are the signs and symptoms of Zika virus?

Zika virus causes symptoms similar to dengue and chikungunya infection. The resulting illness is usually mild and consists of fever, rash, joint pain, conjunctivitis, muscle pain, and headache. Rarely, Zika infections can cause serious complications in otherwise healthy adults.

Zika infections during pregnancy are associated with serious birth defects.

Is there Zika virus in San Mateo County?

No, Zika virus is not currently transmitted in San Mateo County.

How can I protect myself and my family?

The CDC provides updated travel advisories concerning Zika virus and other mosquito-borne infections. The most recent advisory can be found at

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