Ohio’s measles outbreak has grown to 196 cases across 16 counties, according to state health department figures reported on 24 September 2026. The tally includes newly affected Morrow County and marks a sharp rise from the 180 cases recorded a week earlier.

Health officials are urging residents to check their vaccination status as the highly contagious virus continues to spread. The outbreak is part of a wider resurgence of measles across the United States this year, with national cases topping 3,500.

Measles spreads through the air and can cause serious complications, particularly in young children and unvaccinated people. Public health experts say the outbreak highlights gaps in MMR vaccination coverage in some communities. Ohio authorities have been working with local health departments to trace contacts and offer vaccination clinics. The state is expected to release updated figures as the investigation continues, and officials have not ruled out further spread in the coming weeks.