Health officials in Detroit, Michigan have confirmed one case of measles in the city and are warning patients and relatives at a children’s hospital emergency room of possible exposure.

The latest case involves a Detroit male who recently returned from overseas travel and was treated at Children’s Hospital of Michigan emergency room from 12:30-9:30 p.m. Tuesday, according to the Detroit Health Department.

Officials warn that visitors at Children’s Hospital emergency room may have been exposed and urge anyone who may have been exposed to get vaccinated right away.