National Outbreak Update
As of November 6, 2026, the United States has officially surpassed 5,000 confirmed measles cases, according to the latest data released by the Centers for Disease Control and Prevention (CDC). The surge in infections spans 45 states and Washington, D.C., marking a significant public health crisis for the nation. Federal health authorities have now confirmed eight measles-associated deaths this year, with recent fatalities reported in Pennsylvania, New York, and Wisconsin.
The latest figures represent a major escalation in the outbreak, which has been ongoing since early 2026. While the CDC has officially recognized four of the eight deaths, state health departments have reported additional fatalities, indicating that the final count may still evolve as investigations continue. The resurgence of the virus, which was declared eliminated in the U.S. in 2000, is largely attributed to a decline in vaccination coverage, according to iHeart.
Vaccination Gaps and Clinical Impact
Epidemiological data provided by the CDC highlights that approximately 96% of the confirmed cases involve individuals who are unvaccinated or whose vaccination status remains unknown. Only a small fraction of cases, roughly 2% each, occurred in individuals who had received either one or two doses of the measles, mumps, and rubella (MMR) vaccine. These statistics underscore the high efficacy of the two-dose regimen, which the agency maintains is 97% effective against the disease.
The demographic impact of the outbreak is concentrated among younger populations. A plurality of cases has been recorded among those aged 5 to 19, while children under the age of 5 account for 17% of total infections. The clinical burden is also significant; at least 511 patients have required hospitalization, representing 11% of all cases. Among children under 5, the hospitalization rate exceeds 1 in 10, highlighting the severe risks posed to vulnerable age groups.
Federal Response and Next Steps
In response to the rapid spread, the CDC has allocated $100 million in federal funding to support state-level outbreak response activities. These funds are designated for enhanced immunization programs, active disease surveillance, and public outreach to boost lagging vaccination rates. Data from the 2025-26 school year showed kindergarten MMR vaccination coverage at 92.4%, a decline from the 95.2% observed during the 2019-20 school year. Health officials, including CDC Director Erica Shwartz, continue to urge parents to ensure children receive the recommended two doses of the MMR vaccine to curb further transmission.