First Measles Outbreak of 2025 Hits Oconto County, DHS: 9 People Infected – The Wisconsin Department of Health Services (DHS) has confirmed the state’s first measles cases of 2025, with all nine cases reported in Oconto County.
According to a statement released Saturday, health officials confirmed that one case was verified through lab testing at the Wisconsin State Laboratory of Hygiene. The additional eight cases were identified based on symptoms and known contact with the first patient.
“All individuals were exposed during recent out-of-state travel to the same location,” the DHS noted, adding that there is currently no evidence of public exposure in Wisconsin. Because of this, the overall risk to the general public is considered low.
To protect patient privacy, DHS has not released specific details about the individuals affected but is working closely with local health departments in Oconto County to monitor the situation and notify anyone who may have had close contact with confirmed cases.
Measles is a highly contagious viral disease that spreads through the air when an infected person coughs or sneezes. It can be serious, especially for young children, and is preventable through vaccination.
The DHS reminds the public to check their vaccination status, particularly for children and those planning to travel. The measles, mumps, and rubella (MMR) vaccine is widely available and remains the most effective way to prevent infection.
For updates and guidance, residents are encouraged to visit the Wisconsin DHS website or contact their local health provider.