Please note: Information about Zika virus is constantly changing as researchers learn more about it. For the latest information visit cdc.gov/zika.

Zika virus is a virus transmitted by mosquitos currently found in the South Americas and is now being reported in multiple countries. No locally transmitted Zika Virus cases have been reported in Colorado. Travel-related cases are being reported in areas of the United States. View the latest reported cases in the US.


  • 1 in 5 people infected show symptoms.
  • Common symptoms include fever, rash, joint pain, conjunctivitis (red eyes)
  • Mild symptoms typically last several days to a week.
  • There is currently no treatment for Zika virus.
  • Zika virus has been linked to pregnancy complications. Learn more here.


Primary transmission is through the bite of an infected mosquito. The virus can also spread from pregnant mom to unborn child. Transmission has also been reported through sexual contact and blood transfusion.

Recent cases have shown that Zika virus can spread between sexual partners. If you or your partner have recently traveled to a high risk area, take extra precaution before engaging in intercourse.

Travel Advisory

A travel advisory has been issued for those who have traveled or are planning on traveling to areas infected with the virus. Pregnant women or women who may become pregnant are advised to take extra precautions. View the latest areas under Travel Advisory.