CDC Updates Measles Data on November 6: 5,182 Confirmed Cases in 2026 as of November 5, With 43 New Outbreaks and 96 Percent of Cases Outbreak Associated
Atlanta — As of November 5, 2026, 5,182 confirmed measles cases were reported in the United States in 2026, according to the Centers for Disease Control and Prevention measles cases and outbreaks page, updated on November 6. Among these, 5,164 cases were reported by 47 jurisdictions, and 18 cases were reported among international visitors to the United States. The page reflects only confirmed cases notified to CDC as of noon on Thursdays, the agency said.
There have been 43 new outbreaks reported in 2026, with an outbreak defined as 3 or more related cases, and 96 percent of confirmed cases, 4,993 of 5,182, are outbreak associated, comprising 3,608 from outbreaks starting in 2026 and 1,385 from outbreaks that started in 2025, CDC said. For the full year of 2025, 2,289 confirmed cases and 48 outbreaks were reported, with 90 percent of cases outbreak associated. The CDC page lists 4 measles associated deaths in 2026, noting the number is subject to change as reviews are completed.
On coverage, CDC said measles, mumps and rubella vaccine coverage among U.S. kindergartners decreased from 95.2 percent during the 2019 to 2020 school year to 92.4 percent in the 2025 to 2026 school year, below the 95 percent coverage level associated with community immunity, leaving approximately 280,000 kindergartners at risk during the 2025 to 2026 school year. Two doses of MMR vaccine are 97 percent effective at preventing measles, and one dose is 93 percent effective, CDC said.
Measles was declared eliminated in the United States in 2000, CDC said, and state, local, tribal and territorial health departments lead measles case and outbreak investigations, with states holding the most up to date information for their jurisdictions.
Published by GSM · USA (original Chinese edition)
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