The Mercer County Health District has reported a single laboratory-confirmed measles infection in a county resident. In a Facebook post cited by WLIO, the district said it is following up to identify any possible exposures. Officials consider it unlikely that the person exposed the general public while infectious, based on information available so far, but they also say evidence shows measles is spreading in the region.
WLIO reported that about 300 measles cases have been recorded statewide in 2026. Hancock and Van Wert counties have also had confirmed infections this year, according to the station. The Ohio Department of Health says most of the state's cases have involved people who were not vaccinated.
Measles is highly contagious and can produce severe illness, the district said. It spreads through the air and may linger in an area for as long as two hours after an infected person leaves. Symptoms generally appear 10 to 12 days after exposure and often start with high fever, cough, runny nose and red, watery eyes; a red rash usually follows a few days later. Patients are considered contagious from four days before until four days after the rash begins.
The district urges residents to verify vaccination records and get MMR doses as needed. Two doses are described as 97% effective against measles. The usual schedule is a first dose at 12 to 15 months and a second at 4 to 6 years, though the second can be given 28 days after the first. People with documented prior infection or born before 1957 are presumed immune. Anyone with suspected symptoms or exposure should isolate and call a medical office before arriving.