Oconto Public Health released a statement saying there is no known risk to the public, but they will not say where they traveled or how the cases may have spread between those people.

The Wisconsin Department of Health Services (DHS) is urging residents to get vaccinated amid the confirmation of the first measles cases in the state this year and as families begin back-to-school preparation with vaccine rates still down.

The nation is experiencing its worst year for the highly contagious disease in decades. Until now, Wisconsin was an island.