There are now three confirmed cases of measles in Colorado. All investigations are ongoing and are typically handled at the county level with support from the state.

In the state's second measles case of the year, a baby under 1 year old has been confirmed to have the virus. As babies cannot be vaccinated, they are highly vulnerable, health officials warn.

A Pueblo resident was exposed to a measles outbreak in Mexico during travel and tested positive for the disease. Here's everything you need to know.