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.

The Colorado Department of Public Health and Environment said Monday evening that the case was confirmed in Pueblo after an unvaccinated adult traveled to an area of Mexico currently experiencing an outbreak.

The Colorado Department of Public Health and Environment said the case reported Monday in the town of Pueblo was confirmed in an unvaccinated adult who had traveled to an area of Mexico where there was an ongoing measles outbreak. As of March 27, no cases of measles have been confirmed in Utah.

A measles case has been confirmed in an unvaccinated adult who recently traveled internationally, according to Colorado health officials, the first measles case in the state in years as an outbreak of the highly contagious illness continues spreading in Texas and several other states.

ABC News medical contributor Dr. Alok Patel explains the new data published by the Texas Department of State Health Services.

The Texas health department reported 422 cases of measles in the state on Tuesday, an increase from 400 on March 28, as the United States battles one of the largest outbreaks of the disease in the past decade.