The Sconi

The Wisconsin Department of Health Services (DHS) is working with local health departments in St. Croix and Rock counties to identify and notify individuals who may have been exposed to measles from an out-of-state traveler visiting Wisconsin. The exposures are not linked to previously confirmed cases in the state. As of August 19, 2025, there have been nine confirmed cases of measles in Wisconsin.

Health officials have identified two public locations and times where exposure may have occurred. People who were present at these locations during the specified periods are advised to check their immunization status for the measles (MMR) vaccine. Immunization records can be accessed through the Wisconsin Immunization Registry, which provides instructions in English, Spanish, and Hmong. Those unable to access their records should contact their healthcare provider or local health department.

With measles cases being reported across the country, DHS warns that travel-related exposures could become more frequent. According to DHS guidance, staying current on MMR vaccination is considered the best protection against measles. Individuals born before 1957 are generally regarded as immune; all other adults without laboratory evidence of immunity should receive at least one dose of a measles-containing vaccine, while children should get two doses. More details about vaccine recommendations can be found on the DHS measles webpage.

The MMR vaccine is available at doctors’ offices or clinics, local health departments, and some pharmacies. Assistance programs such as Vaccines for Children and Vaccines for Adults may help those without insurance or whose insurance does not cover vaccines.

Measles symptoms typically develop 10-21 days after exposure. For those exposed on August 4, 2025, symptoms would likely appear between August 14-25, 2025. Symptoms include fever, cough, runny nose, red eyes, and rash.

People experiencing any symptoms should stay home from work, school, or shopping and avoid using public transportation. They are encouraged to call their healthcare provider before visiting so precautions can be taken to prevent further spread of the virus.

Further information about measles is available on the DHS measles webpage. Updates related to this investigation will be posted on the DHS Outbreak and Investigations webpage.

"Staying up to date on the MMR vaccine is the best way to stay protected from measles."

Anyone with questions can contact DHSMedia@dhs.wisconsin.gov for more information.