Adams County Health Department (ACHD) officials confirmed the first human case of West Nile virus within the county this year. Additionally, West Nile virus has been found in mosquitoes within the county. 

West Nile virus is most commonly spread to people by the bite of an infected mosquito. In Colorado, most human cases are reported in August and September. In 2021, Colorado had 175 reported human cases of West Nile virus, including 11 deaths.