2026 Measles Cases in US Surge
USA – Measles cases in US have surged to all-time high in 2026, with at least 733 confirmed cases so far, according to the Centers for Disease Control and Prevention (CDC).
The total was reached within just a few weeks, the CDC said, marking a sharp rise from the long-term annual average of about 180 cases since measles was declared eliminated in the country in 2000. The figure excludes last year’s record-breaking total of 2,276 cases.
The surge comes as South Carolina experiences what officials describe as its largest outbreak in recent memory, while multiple other states continue to report active outbreaks.
States with confirmed measles cases include:
- Arizona
- California
- Florida
- Georgia
- Idaho
- Kentucky
- Minnesota
- Nebraska
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- South Dakota
- Utah
- Virginia
- Washington
- Wisconsin
Health officials say most outbreaks are concentrated in communities with low vaccination coverage.
“Because it’s such an infectious virus, whenever you see measles outbreaks, it in effect highlights areas of the country or communities in which vaccination rates are low,” NBC News quoted Demetre Daskalakis, former head of the CDC branch that tracks diseases including measles, as saying.
CDC data show the share of kindergartners vaccinated with the measles, mumps and rubella vaccine has declined from 95% in 2019 to below 93% in 2025.
Public health experts say herd immunity typically requires vaccination rates of about 95% to slow the spread of the virus.
“I think that this highlights that our defenses are down,” Daskalakis said, adding that declining vaccination rates have left about 300,000 kindergarteners unprotected.
The CDC says the two-dose MMR vaccine is about 97% effective at preventing measles infection.
