Ohio officially has a measles outbreak, the state health department announced Wednesday. The outbreak consists of 10 people in Ashtabula County, the Ohio Department of Health (ODH) said in a press release,

The CDC considers three or more cases an outbreak. Ten reported cases in Ohio have been reported in Ashtabula County in the northeast corner of the state, and the three total now in Knox County represents a second outbreak. None of the people in the confirmed cases in Ohio were vaccinated against the disease.

Already, the U.S. has more measles cases this year than in all of 2024, the U.S. Centers for Disease Control and Prevention has said. Other states with outbreaks — defined as three or more cases — include New Mexico, Kansas, Ohio and Oklahoma. Since February, two unvaccinated people have died from measles-related causes.