Measles outbreak in southwestern Wisconsin grows, 2 cases confirmed in Grant County
A measles outbreak has expanded to 39 total cases across southwestern Wisconsin and parts of Iowa, triggering district-wide school responses.
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- Detected The first matching coverage entered the Archynetys cluster.
- Peak measured velocity The recorded velocity reached 7.
- Latest coverage observed Most recent article currently attached to this story cluster.
- Evidence threshold reached The story had enough independent coverage for an explanatory brief.
Source diversity sample: KCRG · thegazette.com · WPR · nwitimes.com · WKOW · kcrg.com · WMTV 15 NEWS · Wisconsin State Journal.
How this dossier is built: methodology · AI policy · corrections.
The obvious questions
How many cases are currently confirmed in Wisconsin?
As of August 18, 2026, there are 36 confirmed cases and 3 probable cases reported in southwestern Wisconsin.
Has the outbreak spread outside of Wisconsin?
Yes, Iowa Health and Human Services has identified a separate measles outbreak in central Iowa.
Are there specific school districts involved?
The Davis County School District is currently taking steps to address the spread of the virus.
The story so far
This figure follows an expansion of the outbreak into Grant County, according to WPR and WMTV 15 News. Iowa Health and Human Services has also identified a measles outbreak in central Iowa. Schools in the Davis County School District are initiating preventative measures, while additional cases have been confirmed in a county bordering the Dubuque area, as reported by KCRG and The Gazette.
These public health developments affect residents and school communities across multiple counties in southwestern Wisconsin and central Iowa. The situation has prompted an active response from regional health officials and local school districts tasked with managing the spread within their jurisdictions. Monitoring of these geographic clusters will continue as health departments work to identify further potential exposures.
Coverage does not yet specify the vaccination status of those infected or the projected timeline for containing the current transmission chains in either state.
Synthesized by Archynetys from the headlines below under a strict no-invention contract. ✓ fact-checked: unsupported claims removed (88% supported) Updated 1h ago.
Coverage (9)
- Davis County School District taking steps to fight measles as cases grow KCRG · 22h ago
- Iowa HHS identifies measles outbreak in central Iowa thegazette.com · 22h ago
- Measles outbreak grows to 36 confirmed, 3 probable cases in southwest Wisconsin WPR · 22h ago
- East Chicago residents lose power again after overnight fire, explosion nwitimes.com · 22h ago
- Measles outbreak grows to 36 cases across southwestern Wisconsin counties WKOW · 22h ago
- Measles cases confirmed in county bordering the Dubuque area kcrg.com · 22h ago
- Measles cases confirmed in county bordering the Dubuque area KCRG · 22h ago
- Southwestern Wisconsin measles outbreak expands to Grant County WMTV 15 NEWS · 22h ago
- Chaotic fights mar last day of 2026 Wisconsin State Fair Wisconsin State Journal · 22h ago
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