ALLEN CO., Oh (3-28-25) – A case of measles has been identified in an unvaccinated Allen County resident under the age of 18. Contacts of the individual have been notified by public health professionals with Allen County Public Health and other health departments in the area to assess their measles vaccination status, and to provide information regarding signs and symptoms of measles and appropriate quarantine measures.

Measles is very contagious. Children infected with measles can spread it to others, even before they have symptoms. The measles virus can live for up to two hours in the air after an infected person leaves the room. Nine out of 10 unvaccinated children who are exposed to measles will become infected. Symptoms may not occur for up to 21 days after exposure to an individual who has measles.

Symptoms of measles can include high fever, cough, runny nose, watery eyes, and a rash beginning 3-5 days after other symptoms occur. Measles can be serious, and about 1 in 5 children who get measles will be hospitalized with complications such as pneumonia, dehydration, or brain swelling.

Unvaccinated individuals are at risk of infection and severe disease. Allen County Public Health urges parents to vaccinate their children to protect them from becoming infected.

Measles cases in 2025

As of March 27, 2025, a total of 483 confirmed measles cases were reported by 20 jurisdictions: Alaska, California, Florida, Georgia, Kansas, Kentucky, Maryland, Michigan, Minnesota, New Jersey, New Mexico, New York City, New York State, Ohio, Pennsylvania, Rhode Island, Tennessee, Texas, Vermont, and Washington.

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There have been 5 outbreaks (defined as 3 or more related cases) reported in 2025, and 93% of confirmed cases (447 of 483) are outbreak-associated. For comparison, 16 outbreaks were reported during 2024 and 69% of cases (198 of 285) were outbreak-associated.