The Indiana Department of Health confirmed Monday the first measles case in the state in over a year. Measles is a highly contagious respiratory disease caused by a virus.

The department says the risk to the public is low, but also says a single case is considered an outbreak because of how easily it spreads. I-D-O-H reports the case is an unvaccinated minor in Allen County, who is stable and recovering. The agency says it’s the first case since one was confirmed in Lake County in early 2024.

Concern about measles has been growing nationally due to a large number of confirmed cases. The Centers for Disease Control and Prevention reports more than 600 confirmed measles cases so far in 2025 across more than 20 states.

I-D-O-H says the measles vaccine, also known as the M-M-R vaccine, is very effective at creating immunity against the virus. Measles can cause cold-like symptoms, red eyes, tiny white spots inside the mouth, and rash. Health officials say people experiencing symptoms should stay home and call their provider before going to the doctor’s office.