Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Powassan Virus: Wisconsin Data

Powassan virus is a rare illness in Wisconsin.

The first case of Powassan virus in Wisconsin was identified in 2003.

In 2022, Wisconsin had eight cases of Powassan virus.

There have been 53 probable and confirmed cases of Powassan virus in Wisconsin from 2003 through 2022.

Powassan virus is preventable.

Learn more about Tick Bite Prevention.

The graphs below show statewide data for Powassan virus.

For national data, visit the CDC (Centers for Disease Control and Prevention) webpage on Powassan Virus Statistics and Maps.

Powassan virus cases in Wisconsin

Powassan virus data

Powassan virus cases by year of onset

Powassan virus cases by month of illness

Powassan virus cases by age groups

Learn more about Powassan virus

Contact us

Questions about illnesses spread by ticks? We’re here to help.

Bureau of Communicable Diseases
Phone: 608-267-9003
Fax: 608-261-4976

Last revised August 16, 2023