Mohave County Department of Public Health

Force in Play

Front-line responder to Arizona’s largest measles cluster in decades

U.S. measles cases reached 4,852 through Oct. 29, more than double the 2,289 recorded in all of 2025, with weekly growth rising to 5.8% and 511 hospitalizations. Pennsylvania's outbreak now stands at 1,398 cases, 265 hospitalizations and five deaths, the largest state outbreak since the early 1990s.

Updated 3 days ago