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Prevention and Transmission

A husband and wife with their two children

What We Know

  • Zika is spread mostly by the bite of an infected Aedes species mosquito (Ae. aegypti and Ae. albopictus). These mosquitoes bite during the day and night.
  • Prevent Zika by avoiding mosquito bites.
  • Zika can be passed from a pregnant woman to her fetus. Infection during pregnancy can cause certain birth defects.
  • Zika can be passed through sex from a person who has Zika to his or her sex partners. Condoms can reduce the chance of getting Zika from sex. Condoms include male and female condoms.
  • No vaccine exists to prevent Zika.
  • Local mosquito-borne Zika virus transmission has been reported in the continental United States.
  • The mosquitoes that can spread Zika are found throughout the United States.
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