BISMARCK – North Dakota Health and Human Services (HHS) is reporting two measles cases in Cass County, bringing the state’s total to 11 cases in 2025. Both individuals were unvaccinated and acquired measles through international travel. One individual is hospitalized. The two cases in Cass County are not related to cases in Williams County.

Members of the public who were present at the following Cass County locations during specific dates and times may have been exposed.

– Essentia Health, The Lights West Fargo Clinic on May 7 between 2:30-6 p.m. The east entrance to the clinic is shared with the Bar Down Sports Bar and Restaurant.

– Essentia Health Walk-in Care, 52nd Avenue, May 9 between 5:30-6 p.m.

HHS, in coordination with Essentia Health, is identifying individuals who may have been exposed. Exposed individuals who were vaccinated don’t need to quarantine but should still monitor for symptoms for 21 days after exposure. Individuals who have not received a dose of the measles, mumps, rubella (MMR) vaccine should stay home and monitor for symptoms for 21 days.

“The MMR vaccine is 93% effective after one dose and 97% effective after two doses,” said Molly Howell, HHS immunization director. “People who are vaccinated and exposed to measles are not likely to develop the disease. MMR vaccination is critical to preventing the spread of measles in the community. Anyone who is eligible and has not yet been vaccinated is encouraged to contact a trusted health care provider about MMR vaccination.”

Individuals unsure of their vaccination status are encouraged to consult their health care provider.

Because the majority of North Dakotans are vaccinated, the risk to the general public is low. People who were vaccinated as children and adults born before 1957 are considered protected due to previous infection.