Measles Cases Surge to Nearly 1,800, Outbreaks Strike 43 Jurisdictions

The Centers for Disease Control and Prevention posted an update on November 26 documenting a sharp rise in measles this year, reporting a cumulative total of 1,798 confirmed cases across 43 jurisdictions as of November 25, 2025. The agency recorded 46 outbreaks and noted that 1,775 cases were reported by U.S. states and local jurisdictions while an additional 23 cases involved international visitors. There have been three confirmed deaths in 2025.

The CDC said most cases were associated with outbreaks and that many infected individuals were unvaccinated. The agency provided guidance and resources intended to support public health responses, vaccination campaigns and community messaging as local officials work to contain transmission. Federal and state health officials warned that sustained chains of transmission could jeopardize the United States measles elimination status, defined as the absence of continuous disease transmission for 12 months or more.

Public health leaders pointed to a combination of factors that have driven the rise. Importations from abroad have seeded outbreaks, and pockets of low vaccination coverage have allowed measles to spread rapidly once introduced. Measles is among the most contagious infectious diseases, and even a small decline in population immunity can produce large outbreaks in susceptible communities.

The surge has strained local health departments that are balancing outbreak control with other routine services. Contact tracing, isolation guidance and surge vaccination clinics demand staffing and funding that many jurisdictions say are already depleted after years of budget shortfalls. Officials have pressed state legislatures and Congress to provide emergency resources to accelerate response efforts and to expand access to vaccines in clinics, schools and community centers.

The outbreaks have also exposed persistent equity gaps in the public health system. Vulnerable populations, including people with limited access to primary care, communities of color and some immigrant communities, are disproportionately affected by disruptions in vaccination services and by misinformation about vaccine safety. Health equity advocates say targeted outreach and culturally competent messaging are critical to closing immunity gaps and preventing future outbreaks.

Policy debates are likely to intensify as officials consider interventions to raise vaccination rates. Measures under discussion include bolstering school immunization requirements, improving vaccine access through free clinics and mobile units, and investing in public education to counter misinformation. Some jurisdictions have reinstated or tightened enforcement of proof of vaccination for communal settings during outbreaks.

The CDC’s update underscored the need for coordinated action by federal, state and local partners. For clinicians, the agency reiterated guidance on testing and reporting suspected cases promptly. For communities, it urged verification of measles, mumps and rubella vaccine status and timely vaccination for those who are not fully immunized.

As the nation heads into winter months when respiratory viruses spread more readily, public health officials cautioned that stopping these outbreaks will require both rapid response and longer term commitments to equitable vaccine access and sustained public health capacity.