WNV Surveillance

2016 West Nile Virus Surveillance Data

Data are updated by noon every other Wednesday.  
Case counts reflect cases completed by local health departments at the time of reporting.  Case counts may temporarily decrease if new information needs to be added, but will be included again when information is complete and the case is closed.  Case counts may differ from CDC due to the timing of the reports.

Illinois Numbers at a Glance
Illinois Human Cases - (136)
Illinois Birds, Mosquitoes, Horses and other Animals
Cumulative totals of West Nile virus infection in birds, mosquitoes and horses by county, municipality and date collected.
Human Cases and Deaths by State
Other States Surveillance Data

Surveillance Data by Year