# Wisconsin reports 21 more measles cases, as outbreak continues to grow

> **Open Intelligence Dossier** · First detected: 2026-09-26 16:40 UTC · Category: Health

## Executive Summary
Wisconsin's measles outbreak swells with 21 new cases and dozens more confirmed across multiple counties on Sept. 25, 2026.

## Intelligence Brief
The same day, the Wausau Pilot & Review confirmed two more cases in Marathon County, raising that county's total to three, while WEAU documented a single confirmed case in a Chippewa County resident. In southwest Wisconsin, Channel 3000 reported 180 confirmed measles cases and six probable cases, underscoring a concentration of infection in that region. WBAY noted that the Department of Health Services (DHS) updated the number of measles cases reported across six Wisconsin counties, though the specific figures for the other counties were not detailed in the headlines. Coverage of the outbreak emphasized the rapid increase in case counts and the geographical spread. The Milwaukee Journal Sentinel highlighted the statewide surge of 21 new cases, framing it as a significant escalation.


Local outlets such as the Wausau Pilot & Review and WEAU focused on county-level confirmations, providing granular data for Marathon and Chippewa counties respectively. Channel 3000's report on southwest Wisconsin contributed the largest single‑county figures, with 180 confirmed and six probable cases, suggesting a hotspot of transmission. WBAY's mention of DHS updates across six counties signaled coordinated state monitoring and an effort to keep the public informed about the evolving situation. Measles, a highly contagious viral disease preventable by vaccination, requires swift public‑health intervention when outbreaks occur. The DHS's role in aggregating case numbers across multiple counties reflects standard protocol for disease surveillance and response.


The reported figures indicate that the outbreak is no longer confined to isolated locales but is affecting broader regions of the state, prompting heightened attention from health authorities and the media. The presence of both confirmed and probable cases in southwest Wisconsin points to ongoing transmission chains that may extend beyond the currently identified clusters. Future reporting will likely focus on additional DHS updates, any public‑health advisories issued by state officials, and potential vaccination campaigns aimed at curbing further spread. Monitoring of case counts in the six counties referenced by WBAY, as well as any new confirmations in other counties, will be critical for assessing the outbreak's trajectory. Stakeholders will watch for statements from health agencies regarding containment measures, resource allocation, and guidance for schools and community settings as the situation develops.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| Wausau Pilot & Review | Two more measles cases confirmed in Marathon County, bringing total to three | [Source Link](https://news.google.com/rss/articles/CBMivAFBVV95cUxNVFM3N2FaZTB0b2x6Nm0yYUxYVXRDSEhLRnBaeWloMkNQTl8zbmVkU2ZKSWQxLVF5b3VJN3hfUzVEQ0o0SlU3bGk0S0R0YjlHZFd0c3hQb3dkVTNUWHNyOFdCYlBNQ0I0cVNEZHhaOEJuM21BZkV0TTlYLVZoam5lUVoyenFWMXFtZk1zaFpncWRFcUt6QXpjMkYxSFJWODF5T3JDVDhSYWdEREhYVDFIcW5sVTFVOHdNZDlnSw?oc=5) |
| Channel 3000 | 180 confirmed, 6 probable measles cases in southwest Wisconsin | [Source Link](https://news.google.com/rss/articles/CBMi3AFBVV95cUxNVnJmS2dSV0FJWGliMWZzQkRFWDluSGVjLTAxSjhUTHFKMHk1T3gyZ3hOdVRMSVUyZHY1dEdJWk5ISms1dnY4THgzT3NNcmltdk9uWWhDS2JKcWxMM0dmV1dNMFlVcmRpVFMweS0xWXNKSUhYUkF1MXJNUjY5TjZqX05xM3JTdWlFdTkxSnRFRVQxSjNoUHkxaUwtcTEwdTZLdURKb0FNU1VtWkl3V2RRZ0xvbmdtVkJudFM5cXlNc1l3dm9yS2d3WWlaZ2xtVU1oLUY2NkdVdTdrdkVG?oc=5) |
| WEAU | 1 case of measles confirmed in Chippewa County resident | [Source Link](https://news.google.com/rss/articles/CBMiigFBVV95cUxQb3Y3NUJxTDlONldlbVYwTXZ1NVppVFV2Z1EwdXcyRkNuQWpxYlpDb3VsZjNfTHh0NURucWdHbHJqSzZEd3JFSWVjd21NOTNwTHh0cE92ak5rT042bHZCY2RHUEc1RjdWdjRnbXRWdndrUC1NQmhMWlZnX3ZSaEZjLXZhbDZXcXJuMGc?oc=5) |
| WBAY | DHS updates number of measles cases reported in six Wisconsin counties | [Source Link](https://news.google.com/rss/articles/CBMingFBVV95cUxORVdHV2V2bUoxTHBVQWFKVFl3UDd4M3NFb1RSZUoxRXV1RVEwdFo2VUVWclVFa2YtMUJsRjBIMUVFR2dhX1RRWFFYRXQ1djNwYVdySEhsYmlIWFNyd3BwcEo2Tzl2cEdmRi1JSE5HNE9QU3BoeklOcmN4OUtRV2s5NEtXRk9VT2VuWVZYemJvZ0lwWHJGeElfUTQ4NEVfZ9IBsgFBVV95cUxNM0pOa0hFZDJWMDVfX05wd0s1UjA4dV9zNmw5dzVNbXBrXzV1U3RjeXo2TUxTcFRLUE0zMHFIRm5WVzF6MEloSUl5S1djUHZjOUhraWY0bmNxNEwzVWhOaldYUWxfZUJjUTJETFAtcjRDVHJhVjVJTkphRFpBVC0xbkpmWktfX3N5dzVwa2VnZ0NQcjFTVGFwa29YenZRN19wQnQ1d0NkZDdIUmhjcXltQWxR?oc) |
| Milwaukee Journal Sentinel | Wisconsin reports 21 more measles cases, as outbreak continues to grow | [Source Link](https://news.google.com/rss/articles/CBMizAFBVV95cUxQbENDdk85Y1MxSGdHT1Qxdm1UdUFDNERxemctZ3RLUU9PdkpIN0lRMlg4T3BsWW4yZEVMVGRnY2gzakhHTHB5YmhFTzNNMW1hUHVhUnZhRmU0YnVEMU5Sb0N0dTZiZktDR0l5dlBCeTBKd2NCSjNFaVRkZWRhenpfODdBcVFxZ2ZaeVRMVG9RODc4WlJlX1BBd3pyOXVTTDNNWDJSTEJEbXR0VGtzZXhkSFNsbHM0Y05tLUpvUEZtLWVBb1BqampJSzJ6MGM?oc=5) |

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*Canonical Source: https://pulse.byoviral.com/trend/2026-09-26/wisconsin-reports-21-more-measles-cases-as-outbreak-continues-to-grow*