Measles infects baby in Colorado: health officials

The child, who is under 1 year old and lives in Denver County, was unvaccinated due to age, according to a statement from the Colorado Department of Public Health and Environment, Denver Health, and the Denver Department of Public Health and Environment.

This is the state's second confirmed case of measles in 2025. Officials said this new case is not related to the first one, which was reported in Pueblo.

Anyone who has visited the Denver Health Emergency Department on Sunday, April 6, between 10:30 a.m. and 4:30 p.m. MT should monitor for symptoms and consider avoiding public gatherings or high-risk settings, Colorado health officials recommended. 

Symptoms typically begin seven to 21 days after exposure, per health officials.

The Centers for Disease Control and Prevention recommends that children receive two doses of MMR (measles, mumps, rubella) vaccine, starting with the first dose at 12 to 15 months of age and the second dose at age 4 through 6.

As of April 3, a total of 607 measles cases were confirmed by 22 jurisdictions, per CDC data.

Those include Alaska, California, Colorado, Florida, Georgia, Kansas, Kentucky, Maryland, Michigan, Minnesota, New Jersey, New Mexico, New York City, New York State, Ohio, Oklahoma, Pennsylvania, Rhode Island, Tennessee, Texas, Vermont and Washington.