West Nile Virus Activity by State 2020

West Nile Virus Activity by State – United States, 2020 (as of June 30, 2020)

Map of the United States showing West Nile Virus Activity by State in 2020. 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 2020: California, Florida, Georgia, Illinois, Louisiana, Michigan, Tennessee and Texas.

West Nile virus infections in humans have been reported to CDC ArboNET from the following states: Arizona, Arkansas, Iowa, Missouri, and New Mexico.