St. Paul, MN (KROC-AM News)  - The Minnesota Department of Health is investigating a case of the measles involving a young child in Hennepin County. Officials say the five-year-old became ill in early August after traveling internationally to a region where the viral infection is still common. The child had not been vaccinated against measles and required hospitalization.

The health department is in the process of notifying public health staff, along with clinic and hospital staff where the child was treated and others who may have been exposed to the child to be on the lookout for any signs of infection. Officials say the child was likely infectious between July 30th and August 7th. If any new cases do develop, it’s expected they would show up between now and the end of the month.

A statement from the health department says Minnesota typically sees between 1 to 4 cases of measles each year, mainly involving people who traveled overseas to countries where measles is more common. Last year, the state experienced its worst outbreak since 1991, with 75 cases identified between April and August. Over 90% of the infections involved people who had not been vaccinated and 21 were hospitalized.