Colorado health officials are warning people who rode the RTD Flatiron Flyer between Boulder and Denver or visited specific locations in Denver and Boulder June 3-6 to watch for measles symptoms. A Boulder County resident, recently returned from Europe, contracted measles and rode the bus multiple times. This marks Colorado's 15th measles case this year, a significant increase from typical years. Symptoms include cough, runny nose, red eyes, fever, and rash. Individuals experiencing symptoms after potential exposure should contact their healthcare provider before visiting a clinic.

Prepared by Olivia Bennett and reviewed by editorial team.