The child who died in the outbreak is the first U.S. death from the highly contagious but preventable respiratory disease since 2015, the U.S. Centers for Disease Control and Prevention said.

The CDC says the majority of measles cases involve people who are un vaccinated, or whose vaccination status is unknown.

Vaccination eliminated measles from the U.S. 25 years ago. But it can still spread in pockets where vaccination rates are low ...