Confirmed

US measles cases hit 5,182, the highest count since 1991

The CDC tally as of November 5 covers 47 jurisdictions.

Leaked on 06 November 2026

Transmission electron micrograph of measles virus particles. Photo: Cynthia S. Goldsmith (public domain) via Wikimedia Commons

The CDC has confirmed 5,182 measles cases in the United States this year, @unusual_whales reported on November 6, the highest count since 1991.

unusual_whales @unusual_whales

BREAKING: US measles cases top 5,000 for the first time in 35 years. The CDC has now confirmed 5,182 cases this year, in 45 states, more than double last year’s total. It’s the highest count since 1991, and Bloomberg reports it puts the US’s measles elimination status at risk.

1,079 likes · 171 reposts · counts as of 09 Nov 2026, 12:49 UTC

— unusual_whales (@unusual_whales) November 6, 2026

Leakly track record

The CDC page says that as of November 5, 5,164 of the cases were reported by 47 jurisdictions, with the rest among international visitors. The post said 45 states; the CDC count is by jurisdiction. Clinical Observer reports 2,289 cases in all of 2025 and about 96% of cases among unvaccinated people or people with unknown status.

The CDC published the count.

Sources

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