CDC reports 416 confirmed U.S. measles cases in 2026 as Carolinas outbreaks drive vaccination push

U.S. health officials are urging vaccination as measles activity continues into early 2026. The CDC reported that, as of January 22, 2026, there were 416 confirmed measles cases in the United States in 2026, with cases reported across multiple jurisdictions and the vast majority linked to outbreaks that began in 2025. ([cdc.gov](https://www.cdc.gov/measles/data-research/?utm_source=openai))

State-level updates in the Carolinas illustrate the ongoing challenge. In South Carolina, the Department of Public Health said the outbreak centered around Spartanburg County had grown to 646 cases as of January 20, 2026, warning that public exposure locations suggest measles is circulating in the community and increasing risk for people without immunity. ([dph.sc.gov](https://dph.sc.gov/diseases-conditions/infectious-diseases/measles-rubeola/2025-measles-outbreak?utm_source=openai))

In North Carolina, the Department of Health and Human Services announced an additional measles case on January 9, 2026, bringing the state’s total to five since late December. Officials emphasized that measles is highly contagious but preventable, and urged unvaccinated residents aged one year and older to get vaccinated, describing immunization as the strongest defense against wider spread. ([ncdhhs.gov](https://www.ncdhhs.gov/news/press-releases/2026/01/09/additional-measles-case-north-carolina-ncdhhs-urges-vaccination?utm_source=openai))

Public health agencies highlighted why measles can be hard to contain: people can be contagious before they realize they are sick, and the virus can linger in the air for up to two hours after an infected person leaves an area. That combination makes rapid identification, isolation guidance, and high community vaccination coverage essential for breaking transmission chains. ([dph.sc.gov](https://dph.sc.gov/diseases-conditions/infectious-diseases/measles-rubeola/2025-measles-outbreak?utm_source=openai))

The CDC’s national update also underscores how outbreaks can persist across calendar years, with 94% of confirmed cases in early 2026 described as outbreak-associated and tied to outbreaks that started in 2025 rather than newly reported outbreaks in 2026. That pattern suggests containment depends heavily on closing immunity gaps in communities where the virus finds repeated opportunities to spread. ([cdc.gov](https://www.cdc.gov/measles/data-research/?utm_source=openai))

Health departments continue to point residents to MMR vaccination guidance, exposure notifications, and symptom information, especially for families and schools. The immediate goal is to reduce the number of susceptible people so that new exposures do not turn into larger clusters, particularly in areas where repeated public exposures have been documented. ([dph.sc.gov](https://dph.sc.gov/diseases-conditions/infectious-diseases/measles-rubeola/2025-measles-outbreak?utm_source=openai))