Utah has spent the past year fighting measles outbreaks — a grim milestone that could affect whether the United States keeps its measles-free designation. More than 680 people have gotten sick since the state's first outbreak began on June 20, 2025. Unlike measles outbreaks in Texas, South Carolina and Arizona, Utah's spread has been tough to contain to one region — infecting undervaccinated communities in nearly every county.
Measles popped up in healthcare settings, big-box stores and restaurants, and youth sporting events. In February, an exposure at a state high school wrestling championship sparked at least 46 cases among attendees. The disease has hit 22 of the state's 29 counties, with the worst spread — 265 illnesses — concentrated in the southwestern part of Utah.
What the Right Is Saying
Conservative voices have raised concerns about government overreach in public health responses. In rural northeastern Utah, where vaccination rates have dropped significantly, some parents expressed wariness about interacting with health authorities.
Cyndie Mattinson, TriCounty's infectious disease specialist, recalled a parent telling a school nurse she didn't want to talk to the health department because "she was worried that we would be angry with her and be judgmental because her children were unvaccinated."
Sydnee Lyons, public information officer for the TriCounty Health Department, said the frontier region had seen a rise in vaccine hesitancy for some time. Some families have sought exemptions based on personal or religious beliefs, contributing to below-threshold immunization rates.
Statewide, 12.8% of kindergarteners were missing their measles vaccines last school year. In the tricounty region — comprising Daggett, Duchesne and Uintah counties — more than 16% of kindergarteners lacked their MMR immunizations, representing the second-largest decline in childhood vaccination rates in Utah.
What the Left Is Saying
Progressive public health advocates say Utah's outbreak underscores the consequences of declining vaccination rates and insufficient community immunity. Dr. Ellie Brownstein, president-elect of the state chapter of the American Academy of Pediatrics and a pediatrician in Salt Lake City, spent the height of the outbreak opposing legislation that would have made school vaccine waivers easier to obtain.
"I don't know that we get it to end," Brownstein said. "I don't know that we're going to get this genie back in the box because there's enough people out there to spread it."
Public health officials argue that the 95% vaccination rate needed for herd immunity remains out of reach partly due to misinformation about vaccine safety. The measles vaccine is 97% protective after two doses. Advocates contend that unvaccinated individuals pose risks to vulnerable populations, including infants too young for the MMR vaccine, pregnant people and those with compromised immune systems.
TriCounty health officials say their approach focused on mitigating spread rather than punishment. Unvaccinated students were excluded from in-person school, and sick individuals were told to isolate. Health workers appealed to community responsibility — asking residents to care for neighbors — which led some previously hesitant families to seek vaccinations.
What the Numbers Show
State data shows the scope of Utah's outbreak:
- More than 680 total measles cases since June 20, 2025
- 22 of 29 counties affected
- 265 illnesses in southwestern Utah alone
- At least 46 cases traced to a high school wrestling championship in February
- 74 cases logged by TriCounty Health Department this spring
- Statewide, 12.8% of kindergarteners missing measles vaccines
- In the tricounty region, more than 16% of kindergarteners unvaccinated
- 95% vaccination rate needed for herd immunity against measles
The national case count reached 2,104 as of June 18, nearly surpassing last year's record total. International health experts will gather in November to determine whether the United States and Mexico have lost their measles elimination status — a designation that requires demonstrating the stoppage of continuous community spread for at least one year.
The Bottom Line
Utah's extended battle with measles has exposed gaps in vaccination coverage while testing local public health strategies. State epidemiologist Leisha Nolen sees little opportunity to rest despite recent slowing of transmission rates.
"It's still here, it's still transmitting," Nolen said. "We just need those few cases to hit the wrong community and it could flare up really big again."
The outbreak's duration may influence whether global health officials strip the United States of its measles elimination status this fall. Canada lost that designation last year following sustained outbreaks.
Health experts warn that colder weather and the start of school in autumn could trigger another surge. Meanwhile, pediatric advocates like Dr. Brownstein say they have not seen a clear cultural reckoning over measles' resurgence — raising questions about whether Utah's outbreak will end anytime soon.