Measles Roars Back: Inside America's Worst Outbreak in Three Decades

A vial of the Measles, Mumps, and Rubella (MMR) vaccination for children is displayed during an immunization event at the L.A. Care and Blue Shield of California Promise Health Plan Community Resource Center in the Panorama City neighborhood of Los Angeles, California, on October 24, 2025. (Credit: Photo by PATRICK T. FALLON/AFP via Getty Images)

The United States is now deep into its worst measles year since the early 1990s, with confirmed infections stacking up across nearly every state just as federal reviewers prepare to decide whether the country keeps the elimination status it has held for a quarter century.

A surge that already broke last year's record