Utah marks a year of battling measles, with no clear end in sight

Key Points:

• Utah has experienced a widespread measles outbreak since June 2025, with over 680 cases across 22 of the state's 29 counties, challenging containment efforts and threatening the U.S. measles-free status.
• The outbreak has heavily impacted undervaccinated communities, especially in southwestern Utah and the rural northeast "tricounty" region, where vaccination rates among kindergarteners are significantly below the 95% threshold needed to prevent outbreaks.
• Public health officials credit targeted mitigation efforts in affected areas, such as excluding unvaccinated students from school and encouraging vaccinations, with helping to manage the spread despite ongoing vaccine hesitancy.
• Measles remains a highly contagious and potentially severe disease, with risks of serious complications and long-term effects, underscoring the importance of the safe and highly effective vaccine.
• The U.S. faces a critical decision on maintaining its measles elimination status later this year, as ongoing outbreaks in Utah and other states raise concerns about sustained community transmission.