A measles outbreak at the Arizona-Utah border has eclipsed 500 cases, state data shows. The number of Arizona cases in Mohave County may be slowing.

Measles is also impacting residents in Maricopa County. And these two areas aren’t alone; Arizona is in the middle of a ...

Measles infections in the U.S. this year are on pace to easily eclipse 2025, when the country reported the most annual cases ...

Cases in Utah have risen rapidly this year. Nearly a quarter of the state’s 486 cases were reported during the last three ...

After a confirmed case of measles at Page High School in Arizona, amid a nationwide surge of cases, a local school district is temporarily requiring students to show proof of measles vaccination to ...

Both Arizona and South Carolina, two states that recorded hundreds of measles cases in recent months, are reporting significant slowdowns in new cases reported this week. Utah, however, has now ...

Measles cases in the United States have climbed to 1,575, with 88 new infections, the Centers for Disease Control and ...

Long-simmering outbreak picked up steam after wrestling tournament ...

Last week, the Centers for Diseases Control and Prevention posted online its first large tranche of advanced genetic data from measles viruses spreading last year. Scientists with knowledge of the ope ...