West Nile Virus Activity by State 2022

West Nile Virus Activity by State – United States, 2022 (as of June 14, 2022)

Map of the United States showing West Nile Virus Activity by State in 2021. See Data table below.

*WNV human disease cases or presumptive viremic blood donors. Presumptive viremic blood donors have a positive screening test which has not necessarily been confirmed.

†WNV veterinary disease cases, or infections in mosquitoes, birds, or sentinel animals.

Data table: WNV infections in mosquitoes, birds, sentinel animals, or veterinary animals have been reported to CDC ArboNET from the following states for 2022: Arizona, California, Florida, Illinois, Louisiana, Tennessee, and Texas.

West Nile virus infections in humans have been reported to CDC ArboNET from the following states: Arizona, Georgia, Mississippi, and Texas.