Pennsylvania measles outbreak exceeds 1000 cases in largest spike since 1990s

Pennsylvania state health officials confirmed on Monday, October 5, 2026, that the state has surpassed 1,000 cases of measles this year. The Guardian Health, CIDRAP, The Washington Post, NBC10 Philadelphia, and ABC7 Eyewitness News all reported that this is Pennsylvania's largest measles outbreak in more than three decades. [1][3][4][5][6]

According to The Guardian Health, Pennsylvania health department figures show 1,004 confirmed measles cases in the state. Five residents in Pennsylvania have died after contracting the disease, and 198 people have been hospitalized. [1]

The outbreak extends beyond Pennsylvania. The Guardian Health reported that more than 3,800 cases have been recorded across the United States, with neighboring states reporting hundreds of cases. Neighboring New York has declared a state of emergency over its measles rates. [1]

The World Health Organization declared measles eliminated from the United States in 2000 because of successful vaccination efforts. However, the disease is continually reintroduced when unvaccinated individuals travel to regions where measles remains active, with anti-vaccination sentiment contributing to ongoing outbreaks. [7]