Preliminary Maps & Data for 2020

CDC Disease Maps

National & state maps (including county-level data) from 2003 – present.

As of January 5, 2021, a total of 44 states have reported West Nile virus infections in people, birds, or mosquitoes in 2020. Overall, 557 cases of West Nile virus disease in people have been reported to CDC. Of these, 422 (76%) were classified as neuroinvasive disease (such as meningitis or encephalitis) and 135 (24%) were classified as non-neuroinvasive disease.

West Nile Virus Disease Cases & Presumptive Viremic Blood Donors by State [Table]
West Nile Virus Activity by State [Map]
West Nile Virus Neuroinvasive Disease Incidence by State [Map]
National & state maps (including county-level data) from 2003 – present.

Page last reviewed: January 5, 2021

Content source: Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Vector-Borne Diseases (DVBD)