Statistics & Maps
West Nile virus disease is a nationally notifiable condition. Cases are reported to CDC by state and local health departments using standard case definitions. Arboviral surveillance data are reported to CDC through ArboNET. In addition to human disease, ArboNET maintains data on arboviral infections among presumptive viremic blood donors, veterinary disease cases, mosquitoes, dead birds, and sentinel animals.
- Preliminary Maps & Data for 2020
- Preliminary Maps & Data for 2019
- Final Maps & Data for 1999–2018
Arboviral surveillance data are also available at the webpages of the following organizations: