Wisconsin Recorded 164 Measles Cases This Year
Most patients were unvaccinated as health officials track new cases in Vernon and Marathon counties.
Updated on Sept. 18, 2026 in Allergies
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Wisconsin has logged 164 measles cases so far this year, with a significant majority involving unvaccinated individuals. Recent activity includes two new cases reported in Vernon County on September 16.
Why it matters
Measles is a highly contagious virus, and the high number of cases among unvaccinated individuals underscores the importance of maintaining up-to-date immunizations. Local residents should verify their vaccination status to understand their protection against the ongoing spread.
Official state surveillance confirmed 164 total measles cases through September 15, with 163 of those patients unvaccinated. Five measles-related hospitalizations have also been recorded in the state this year.
The players
Wisconsin State Lab of Hygiene
A public laboratory providing testing and diagnostic support for state health surveillance.
Wisconsin Immunization Registry
A state-run database where residents can verify their own or their family's vaccination status.
The details
Measles is a virus that spreads easily through the air, where it can remain for up to two hours after an infected person has left a room. The Wisconsin State Lab of Hygiene uses laboratory testing to confirm suspected cases, such as the single case recently identified in Marathon County that originated from out-of-state travel. Maintaining immunization records is a primary tool for assessing individual protection.
Timeline
164 measles cases were recorded in Wisconsin through September 15.
Vernon County reported two new measles cases on September 16.
Marathon County reported no new measles cases as of September 18.
Health Landscape
This cluster of cases represents a notable uptick in viral transmission across Wisconsin. Current reporting follows the established statewide tracking protocols used to identify and contain outbreaks in affected counties.
Residents should check their vaccination records through the Wisconsin Immunization Registry to ensure they are up to date. If you have questions about your immunization history or measles immunity, reach out to your primary care physician.
The takeaway
Measles remains a highly infectious threat, especially for those who are unvaccinated. Ensure you are familiar with your vaccination history and consult your doctor regarding any concerns about potential exposure.
Further reading
For more information on monitoring health risks and immunizations, visit our Allergies section.
More information
To verify your immunization status, visit the Wisconsin Immunization Registry.
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Do you trust that current public health measures are sufficient to contain measles in your area?
