The facts
The CDC listed 5,182 confirmed U.S. measles cases in 2026 as of 5 November, in a page updated 6 November. [1]
Reuters reported that the annual count had exceeded 5,000 for the first time since 1991. [2]
The CDC recorded 43 outbreaks and said 96% of reported cases were outbreak-associated; that classification does not mean every case was unvaccinated. [1]
Reuters reported 562 hospitalizations in the CDC data; the total case count can change as surveillance is updated. [2]
Still unconfirmed
- The final 2026 case and hospitalization totals are not yet known.
- The sources reviewed do not establish a single cause for the national rise or a federal emergency declaration.
Sources
References support the numbered facts above. Source checks: 7 Nov 2026, 05:46 UTC.
CDC surveillance provides the current count; Reuters supplies the annual historical comparison and hospitalization figure. Outbreak association is not presented as vaccination status.
- Measles cases and outbreaks
U.S. Centers for Disease Control and Prevention · Primary source · 6 Nov 2026
Opened the CDC surveillance page updated 6 November, listing cases through 5 November, outbreak counts and outbreak-associated share.
- U.S. measles cases rise to 5,182, CDC says
Reuters via Investing.com · Reporting · 6 Nov 2026
Opened Reuters report on the CDC update; it says the annual tally first topped 5,000 since 1991 and reports hospitalizations.