SALT LAKE CITY — Utah health officials continued efforts to contain a measles outbreak on Saturday, one year after the state reported its first cases, as public health agencies warned that transmission has persisted across much of the state despite vaccination campaigns and community outreach.
The outbreak, which began in June 2025, has resulted in more than 675 confirmed cases, according to data published by the Utah Department of Health and Human Services earlier this month. State officials said cases have been reported in nearly every region of Utah, making it one of the most widespread measles outbreaks the state has faced in recent decades.
Health authorities have responded with vaccination clinics, public information campaigns, school exclusion policies for unvaccinated students exposed to the virus, and expanded case-tracing efforts. Officials have repeatedly emphasized that the measles, mumps and rubella (MMR) vaccine remains the most effective protection against infection.
“Public health needs your help to stop the spread of measles,” the Utah Department of Health and Human Services said in a statement issued during the outbreak response. The department added that the MMR vaccine is highly effective and urged residents to verify their vaccination status.
State epidemiologists have linked parts of the outbreak to communities with lower vaccination rates, while additional transmission has occurred at schools, public gatherings and healthcare settings. A large high school wrestling event earlier this year was associated with dozens of infections, according to health officials cited by the Associated Press.
The outbreak has unfolded amid a broader increase in measles cases across the United States. Federal data cited by health organizations show that a large majority of reported measles patients nationally were either unvaccinated or had unknown vaccination status. Utah health officials have said the virus spread beyond the areas where the outbreak was first detected and eventually reached all local health districts in the state.
Public health experts have expressed concern that prolonged transmission could affect the United States’ measles elimination status, a designation maintained since 2000. Officials said reviews by national and international health authorities are ongoing, though no determination has been announced.
As of Saturday, Utah health authorities continued to report new infections, though at a slower pace than earlier in the year. The state’s measles dashboard showed only a limited number of newly reported cases in recent weeks, but officials said transmission had not been fully interrupted and urged residents to remain vigilant. Details on when the outbreak may be declared over remain unclear.
