On Sept. 10, 2025, the Utah Department of Health and Human Services (UDOH) reported a potential large exposure of more than 2,000 people to measles at a local high school in Hildale.

As cases are reported, public health officials in Utah investigate to identify individuals who are at risk of infection and any locations where possible exposures may have occurred. These exposure locations can be found in the table above.

Measles symptoms typically appear 7 to 14 days after exposure. People who have a high fever (101°F (38.3°C) or higher) and a cough, runny nose, or red eyes may have early stages of measles. A rash will usually appear after 4 days of fever. If you do develop symptoms you should stay away from other people and call your healthcare provider. Call first before you go to a clinic or hospital to prevent other people from exposure.

The UDOH strongly encourage at least 1 dose of MMR for all people older than 1 year of age, even if they have not been exposed to someone with measles.

About 10% of in-person kindergarten students in Utah had an exemption for the MMR vaccine or were missing documentation to show they were vaccinated against measles. 9.0% of in-person kindergarten students in Utah had an exemption to any school-required vaccine, and 10.1% of all students in Utah had an exemption to any school-required vaccine, including students in online schools.