Influenza: Wisconsin Data

Weekly influenza case counts are organized by flu season. View available reports by choosing a season or see the table listing all reports.

• 2024-25 flu season began reporting on October 5, 2024
• 2023-24 flu season began reporting on October 21,2023
• 2022-23 flu season began reporting October 1, 20223
• 2021-22 flu season began reporting July 3, 2021
• 2020-21 flu season began reporting October 17, 2020
• 2019-20 flu season began reporting October 5, 2019
• 2018-19 flu season began reporting October 13, 2018

For additional influenza data in Wisconsin, visit our webpages for respiratory illness data or influenza vaccine data.

For national data, visit the Centers for Disease Control and Prevention Flu Activity and Surveillance page.

Questions about influenza? Contact us!
Phone: 608-267-9003 | Fax: 608-261-4976