The population is spread out among 3.8 million square miles across 50 states, yet nearly one-third of Americans live in just three states: California, Texas and New York.

Texas announced the first measles death in the U.S. in a decade last week amid an ongoing outbreak. Here's where measles has ...

Measles is spreading, with officials in New Jersey saying they have recorded their first measles outbreak in ten years ...

As Texas continues to battle a growing measles outbreak largely among its unvaccinated children, six other states have ...

Measles was declared eliminated in the United States in 2000 but has since made a comeback which experts attribute to international travel and the rise of anti-vaccine sentiment. It remains to be seen ...