CDC reports 416 measles cases so far in 2026 as outbreaks tied to last year continue
The CDC’s latest update shows measles cases continuing to climb early in 2026, with most infections linked to outbreaks that began in 2025. Health officials warn that falling vaccination coverage leaves pockets of communities vulnerable, and they urge families to check MMR status and follow public health guidance if exposure is suspected.
Measles counts rise early in the year
The U.S. Centers for Disease Control and Prevention (CDC) reported that, as of January 22, 2026, there have been 416 confirmed measles cases in the United States in 2026. The agency said the cases were reported by 14 jurisdictions, and that the overwhelming majority are associated with outbreaks—primarily outbreaks that started in 2025 and continued into the new year.
Public health officials stress that measles is among the most contagious infectious diseases and can spread quickly in communities with low vaccination coverage. While many people recover, measles can cause severe complications, especially in infants, pregnant people, and individuals with weakened immune systems. Health departments continue to emphasize rapid identification of suspected cases, isolation protocols, and vaccination efforts to limit transmission.
Why vaccination coverage matters
Alongside case counts, the CDC has highlighted a decline in MMR vaccine coverage among U.S. kindergarteners in recent years. Even small percentage drops can translate into large numbers of unprotected children, creating local clusters where measles can spread rapidly once introduced. Officials note that statewide averages can mask significant variation at the county, school, or neighborhood level.
Because outbreaks often expand through social networks and shared spaces—schools, childcare, places of worship, and community events—health agencies emphasize targeted outreach. This includes contacting families who may have missed doses, offering clinics with extended hours, and distributing clear guidance on symptoms and when to seek medical attention.
What families should do now
Clinicians and local health departments recommend that parents and caregivers confirm children are up to date on the MMR vaccine series, especially before travel or participation in large gatherings. People who think they may have been exposed are urged to call ahead before visiting a clinic or emergency department, so facilities can take steps to reduce the risk of exposure to others.
The CDC’s numbers are preliminary and may be updated as jurisdictions complete investigations. Still, the early-year tally and the high proportion of outbreak-associated cases underscore how quickly measles can rebound when immunity gaps persist.
- CDC reported 416 confirmed U.S. measles cases in 2026 as of January 22, 2026.
- Most cases are linked to outbreaks that began in 2025 and continued into 2026.
- Declining MMR coverage creates pockets of vulnerability even where statewide rates look high.
- Families are urged to verify vaccination status and call ahead if exposure is suspected.