Updated
Updated · Reuters · Oct 30
U.S. Measles Cases Climb to 4,852 as 96% Hit Unvaccinated or Unknown-Status People
Updated
Updated · Reuters · Oct 30

U.S. Measles Cases Climb to 4,852 as 96% Hit Unvaccinated or Unknown-Status People

2 articles · Updated · Reuters · Oct 30

Summary

  • CDC data showed 4,852 U.S. measles cases this year as of Thursday, up 264 from the previous update.
  • 96% of infections were in unvaccinated people or those with unknown vaccination status, up from 93% in 2025.
  • 511 people have been hospitalized—11% of reported cases—with ages 5 to 19 accounting for the largest share at 2,010 cases.
  • Pennsylvania alone has reported 1,398 cases and five measles-related deaths, while the CDC has confirmed three measles-associated deaths nationwide without identifying the states.

Insights

Why are U.S. measles cases nearing 5,000 in 2026, and what does Pennsylvania’s deadly outbreak reveal about vaccination gaps?
As hospitalizations top 500, what should families and adults with uncertain MMR records do right now to avoid measles?