US EditionMeasles Case Confirmed in Boulder County Resident
- A fully vaccinated Boulder County adult who traveled to Europe contracted measles and exposed passengers on the RTD Flatiron Flyer bus in early June 2025.
- This exposure occurred amid a surge in Colorado measles cases linked mainly to travel, with 15 total confirmed infections this year.
- Possible exposures also took place at Denver and Boulder locations including Market Building, Little Finch Coffee Shop, Whole Foods, and Rosetta Hall from June 3 to 6.
- The MMR vaccine is about 97% effective, breakthrough cases generally cause milder illness, and health officials advise exposed individuals to call ahead before seeking care.
- The case highlights ongoing measles outbreaks and the importance of monitoring symptoms and vaccination to prevent further spread in Colorado communities.
14 Articles
14 Articles
Denver Post
Boulder County resident exposed Flatiron Flyer passengers to measles
People who took the Flatiron Flyer bus between Boulder and Denver last week should watch for measles symptoms, as should people who spent time in the Market Building on 16th Street.
What happens when you go to the ER with measles?
When measles symptoms like rash and fever bring patients to a Colorado Springs ER, they’re immediately isolated to prevent transmission. El Paso County cases are increasing amid declining vaccination rates.
Colorado public health officials confirm measles case, release locations for potential exposures in Boulder and Denver | Colorado Department of Public Health and Environment
Denver (June 13, 2025) — The Colorado Department of Public Health and Environment, Boulder County Public Health, and the Denver Department of Public Health and Environment have confirmed a case of measles in a Boulder County resident and are notifying members of the public of additional areas for potential measles exposures. The fully vaccinated adult recently traveled to Europe, where there are a large number of measles cases.
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