Wisconsin Measles Outbreak Reaches 36 Confirmed Cases as MMR Coverage Sits at 85.1%
Updated
Updated · WPR · Aug 18
Wisconsin Measles Outbreak Reaches 36 Confirmed Cases as MMR Coverage Sits at 85.1%
3 articles · Updated · WPR · Aug 18
Summary
Two Grant County infections pushed southwestern Wisconsin's measles outbreak to 36 confirmed and three probable cases, up from 15 confirmed and six probable cases reported last week.
State health officials said no public exposure sites have been identified, but county teams are tracing contacts, testing suspected cases and offering post-exposure vaccination to people with uncertain immunization status.
All but one Wisconsin measles patient this year were unvaccinated, most are 17 or younger, and two people have been hospitalized.
CDC data showed only 85.1% of Wisconsin kindergarteners had MMR coverage in 2025-26, a level state officials called dangerously low for a virus that can linger in the air for two hours.