
Milwaukee measles case tied to out-of-state exposure, first Wisconsin wastewater detection
A measles case in Milwaukee County is linked to an out-of-state case, with Wisconsin reporting its first measles signal in wastewater from Walworth County. Investigators say the exposure may have occurred at public locations tied to Flight WN 266 from Phoenix to Milwaukee on Jan. 29, 2026, 10:31 p.m.–12:31 a.m.; no other Walworth County exposures are known at this time. Health officials are notifying close contacts and will post updates. Vaccination with the MMR vaccine can prevent measles; individuals should check their vaccination status and contact a provider if unvaccinated or if symptoms develop, typically 10–21 days after exposure.













