U.S. measles cases hit 2,030 as outbreaks spread nationwide

Measles is still spreading in the United States because the virus keeps finding communities with too few vaccinated people, even though the disease is preventable and the country eliminated endemic measles in 2000. The Centers for Disease Control and Prevention said Friday that U.S. cases had climbed to 2,030, a provisional count that remains subject to change as states reconcile reports. CDC says measles can travel through the air and stay infectious in the air and on surfaces for up to two hours after an infected person leaves, giving each exposed cluster a chance to ignite another one.

The scale of this year’s spread has already outpaced recent warning signs. CDC said there were 49 outbreaks in 2025, 87% of reported cases were outbreak-associated, and 12% of patients were hospitalized. Three people died last year: one unvaccinated adult in New Mexico and two unvaccinated school-aged children in Texas. By April 17, 2025, CDC had already counted 800 cases, which it described as the second-highest annual total in 25 years.

The danger is not abstract. In 2019, the United States nearly lost elimination status after almost 1,300 measles cases tied to a large New York outbreak and cases in 30 other states. The current count of 2,030 cases shows how quickly the virus can regain momentum when immunity drops in enough places. CDC has warned that most cases have been among children and adolescents who were unvaccinated or whose vaccination history was unknown, underscoring the role of missed shots and weak coverage in keeping outbreaks alive.

South Carolina offers the clearest recent example of how fast measles can grow inside an under-vaccinated community. CDC said that by March 3, 2026, health officials had identified 990 cases in the Upstate region, mostly in Spartanburg County, after the state first reported the outbreak on Oct. 2 with eight confirmed cases. What began as a small cluster became a regional outbreak in months, a pattern that public health officials say is most likely when transmission enters communities with low vaccination coverage.

CDC acting Director Jay Bhattacharya recently told more than 2,000 public health partners on a national webinar that trust and collaboration are central to the response. That is the broader test now: whether federal, state and local health agencies can rebuild confidence fast enough to stop imported cases from spreading into the pockets of the country where measles still has room to move.