That person, an adult whose vaccination history isn’t yet known, hadn’t left Colorado and didn’t cross paths with either of ...

A Colorado baby recently in Mexico with family has become the second reported measles case in Colorado in 2025.

The Colorado Department of Public Health and Environment tracks vaccination rates in school districts, child care centers, ...

A measles infection was identified in a Pueblo County resident on March 31. The case is Colorado's first in 2025.

Kennedy’s estimate follows the latest update from the Centers for Disease Control and Prevention, which reported last Friday 607 confirmed cases in the U.S. so far this year, far surpassing the 285 ...