Colorado Officials Issue Measles Exposure Alert for Denver and Steamboat Springs Areas

September 19, 2026 - 04:00

Public health authorities in Colorado are urging residents to stay alert after confirming a case of measles involving an out-of-state visitor who was not vaccinated. The individual traveled through several locations in the state, prompting officials to identify potential exposure sites in both Denver and Steamboat Springs.

The Colorado Department of Public Health and Environment announced the situation earlier this week, noting that the risk extends to anyone who may have crossed paths with the infected person at specific times and places. Measles is highly contagious and can linger in the air for up to two hours after an infected person leaves a room. Symptoms typically include fever, cough, runny nose, red eyes, and a distinctive rash that spreads across the body.

Health experts stress that the best protection against measles is the MMR vaccine, which is safe and effective. People who are unvaccinated, especially young children and those with weakened immune systems, face the greatest risk. Officials recommend checking immunization records and contacting a healthcare provider if exposure is suspected.

Residents who visited the affected areas during the identified timeframes should monitor themselves for symptoms for up to 21 days. Anyone developing signs of illness should call ahead before visiting a clinic or emergency room to prevent further spread. Public health teams continue to investigate and will provide updates as new information becomes available.