Measles exposure reported at Old Mill Elementary

A nurse gives a measles, mumps and rubella virus vaccine made by Merck at the Utah County Health Department in Provo, Utah. Photo: George Frey

Wasatch County health officials say unvaccinated third-grade students should stay home for 21 days after possible exposure.

WASATCH COUNTY, Utah — Wasatch County health officials are warning families about a possible measles exposure at Old Mill Elementary School after a positive case was identified at the school.

In a May 19 letter to families, the Wasatch County Health Department said exposure may have occurred at Old Mill Elementary on Friday, May 15. The department said anyone in third grade who has not received the measles, mumps, and rubella vaccine should stay home for 21 days from the last possible exposure date.

“Measles is highly contagious and can remain in the air up to two hours after an infected person leaves the room,” the letter said.

The health department advised families who are unsure of their child’s vaccination status to contact their health care provider, check Utah’s immunization record system, or visit the Wasatch County Health Department.

The school notice comes as Utah continues to respond to its largest measles outbreak since 1976. Earlier this week, Utah had reached 663 measles cases, though the outbreak appeared to be tapering. The Utah Department of Health and Human Services now lists 671 Utah residents diagnosed in the current outbreak, including 474 cases in 2026 and 197 cases in 2025.

TownLift has followed the outbreak as it has moved through the region, including a previous Wasatch County cluster involving Wasatch High School students in November and Summit County’s first confirmed case in January. Summit County health officials said at the time that the case involved a South Summit Elementary School student who attended school while infectious, prompting local health officials to urge vaccination and symptom monitoring.

Measles symptoms typically include fever, cough, runny nose, red eyes, and a rash. Health officials have repeatedly advised people who may have been exposed and who develop symptoms to call ahead before visiting a clinic, urgent care center, or emergency room, because the virus can spread in waiting rooms. In December, state epidemiologists were particularly concerned about measles spreading through health care settings as the outbreak expanded across Utah.

The Wasatch County Health Department said families with questions can contact the department directly.