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Measles Cases and Outbreaks
What to know
- Updated on March 28, 2025. The data on this page reflects confirmed measles cases reported to CDC as of noon on Thursdays.
- Starting 2/21/25, CDC will update this page every Friday.
Measles cases in 2025
As of March 27, 2025, a total of 483 confirmed* measles cases were reported by 20 jurisdictions: Alaska, California, Florida, Georgia, Kansas, Kentucky, Maryland, Michigan, Minnesota, New Jersey, New Mexico, New York City, New York State, Ohio, Pennsylvania, Rhode Island, Tennessee, Texas, Vermont, and Washington.
Find more real-time updates of measles cases reported by:
- Texas Department of State Health Services (DSHS)
- New Mexico Department of Health
- Ohio Department of Health
- Kansas Department of Health and Environment (KDHE)
Find updated outbreak recommendations issued by state or local health departments:
- Texas | DSHS | Updated MMR Vaccination Recommendations
- Kansas | KDHE | Updated MMR Vaccination Recommendations
There have been 5 outbreaks (defined as 3 or more related cases) reported in 2025, and 93% of confirmed cases (447 of 483) are outbreak-associated. For comparison, 16 outbreaks were reported during 2024 and 69% of cases (198 of 285) were outbreak-associated.
*NOTE: CDC is aware of probable measles cases being reported by jurisdictions. However, the data on this page only includes confirmed cases.
U.S. Cases in 2025Total cases 483 |
| Age Under 5 years: 157 (33%) 5-19 years: 204 (42%) 20+ years: 111 (23%) Age unknown: 11 (2%) |
| Vaccination Status Unvaccinated or Unknown: 97% One MMR dose: 1% Two MMR doses: 2% |
U.S. Hospitalizations in 202514%14% of cases hospitalized (70 of 483). |
| Percent of Age Group Hospitalized
Under 5 years: 25% (40 of 157) |
U.S. Deaths in 20252There has been 1 confirmed death from measles, and 1 death under investigation. |
Measles cases in 2024
As of December 31, 2024, a total of 285 measles cases were reported by 33 jurisdictions: Arizona, California, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New Mexico, New York City, New York State, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Vermont, Virginia, Washington, Wisconsin, and West Virginia.
There have been 16 outbreaks (defined as 3 or more related cases) reported in 2024, and 69% of cases (198 of 285) are outbreak-associated. For comparison, 4 outbreaks were reported during 2023 and 49% of cases (29 of 59) were outbreak-associated.
U.S. Cases in 2024Total cases 285 |
| Age Under 5 years: 120 (42%) 5-19 years: 88 (31%) 20+ years: 77 (27%) |
| Vaccination Status Unvaccinated or Unknown: 89% One MMR dose: 7% Two MMR doses: 4% |
U.S. Hospitalizations in 202440%40% of cases hospitalized (114 of 285) for isolation or for management of measles complications. |
| Percent of Age Group Hospitalized Under 5 years: 52% (62 of 120) 5-19 years: 25% (22 of 88) 20+ years: 39% (30 of 77) |
*2023–2025 case counts are preliminary and subject to change.
*2023–2025 case counts are preliminary and subject to change.
History of measles cases
Measles was officially eliminated from the United States in 2000, meaning there is no measles spreading within the country and new cases are only found when someone contracts measles abroad and returns to the country. Achieving measles elimination status in the United States was a historic public health achievement. The below figure illustrates how common measles was before vaccines and how vaccine policy enabled elimination.
MMR vaccine coverage for kindergarteners by school year (2009–2024)
The measles, mumps, and rubella (MMR) vaccine is very safe and effective. When more than 95% of people in a community are vaccinated (coverage >95%), most people are protected through community immunity (herd immunity). However, vaccination coverage among U.S. kindergartners has decreased from 95.2% during the 2019–2020 school year to 92.7% in the 2023–2024 school year, leaving approximately 280,000 kindergartners at risk during the 2023–2024 school year. To dive into vaccine coverage data for MMR, visit VaxView.
At local levels, vaccine coverage rates may vary considerably, and pockets of unvaccinated people can exist in states with high vaccination coverage. When measles gets into communities of unvaccinated people in the United States, outbreaks can occur.
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