Overview

• The CDC reports 1,288 confirmed measles cases across 38 states in 2025, surpassing the previous high from 1992.
• Two children and an adult have died this year—the first measles fatalities in a decade—and 13 percent of cases required hospital care.
• Unvaccinated individuals represent 92 percent of infections as MMR coverage among kindergarteners dropped to 92.7 percent, below the 95 percent threshold for herd immunity.
• At least 27 linked outbreaks account for 88 percent of cases, with the largest cluster originating in under-vaccinated Mennonite communities in West Texas.
• Officials warn that sustained transmission through July could revoke the U.S. measles elimination status and heighten the risk of other vaccine-preventable diseases resurging.