Measles tracker: Follow cases, outbreaks and vaccination rates across the U.S.

Photo: Skin rash on a patient’s abdomen 3-days after the onset of a measles infection. The image was captured at New York Hospital-Cornell Medical Center in 1958. Image source: CDC / Heinz F. Eichenwald, MD. Public Domain. Article by Joe Murphy. NBC News – updated July 4, 2025.

Measles is among the most contagious diseases in the world, and case counts in the United States are ticking up. NBC News is tracking confirmed measles cases across the country with data from state health departments. The data will be updated every week. […]

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Curated by Theresa Wysocki

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