04/16/2026
Measles in Michigan: Washtenaw County outbreak, MMR vaccine gaps and key actions for providers
Public Health Bulletin for Health Care Providers - April 2026
Dear colleagues,
As of Wednesday, April 15, eight confirmed measles cases have been identified in southeast Michigan — seven in Washtenaw County and one in Monroe County — with evidence of possible unlinked community transmission. As this situation continues to develop, impacted jurisdictions and associated guidance may expand as additional cases are identified.
Situational update
On Wednesday, March 11, Michigan’s first measles case of 2026 was confirmed in an unvaccinated Washtenaw County resident with recent travel to a Florida outbreak site. An outbreak (three or more related cases) was declared Thursday, March 12. As of Friday, April 10, seven cases are linked in this outbreak.
On Wednesday, April 1, an eighth case of measles in Michigan was confirmed in Monroe County, in a patient with no international travel history and no definitive epidemiological link to the Washtenaw County outbreak. The geographic proximity and timing of this case raises concerns about unlinked community transmission in southeast Michigan.
As of Thursday, April 2, the U.S. has reported 1,671 measles cases nationally this year alone, with 94% linked to 17 outbreaks, reflecting a substantial increase in outbreak activity from prior years.
Follow Michigan.gov/measles for updates.
Michigan's Women, Infants & Children program, providing supplemental nutrition, breastfeeding information, and other resources for healthy mothers & babies.