Oropouche Virus: About

Oropouche virus is spread to people primarily by infected biting midges (also called “no-see-ums"). Some mosquitoes can also spread the virus.

Oropouche virus has been found in parts of South America, Central America, and the Caribbean. Cases of Oropouche virus have been reported in the U.S. among people who have recently traveled to an area with Oropouche. Wisconsin residents who travel to an area where Oropouche virus is found are at risk for infection.

Oropouche virus is preventable. For country-specific travel information and recommendations, visit the CDC’s (Centers for Disease Control and Prevention) Travelers’ Health page.

Last revised March 7, 2025