Measles Cases and Outbreaks
For Everyone
July 24, 2026
Español
What to know
Updated on July 24, 2026.
The data on this page reflect confirmed measles cases reported to CDC as of 12:00PM on Thursday.
Measles cases in 2026
Resources for Communities with a Measles Outbreak:
Sample Community Letter About MeaslesBe Ready for Measles Toolkit
There's a Current Outbreak of MeaslesDo You Think Your Child Has Measles?
As of July 23, 2026, 2,318 confirmed* measles cases were reported in the United States in 2026. Among these, 2,302 measles cases were reported by 45 jurisdictions: Alabama, Alaska, Arizona, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Idaho, Illinois, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, New Jersey, New Mexico, New York City, New York State, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, Wisconsin, and Wyoming. A total of 16 measles cases were reported among international visitors to the United States.
There have been 35 new outbreaks** reported in 2026, and 93% of confirmed cases (2,153 of 2,318) are outbreak-associated (782 from outbreaks starting in 2026 and 1,371 from outbreaks that started in 2025).
For the full year of 2025, a total of 2,289 confirmed* measles cases were reported in the United States. Among these, 2,263 measles cases were reported by 45 jurisdictions: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Jersey, New Mexico, New York City, New York State, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, Wisconsin, and Wyoming. A total of 26 measles cases were reported among international visitors to the United States.
There were 48 outbreaks** reported in 2025, and 90% of confirmed cases (2,066 of 2,289) were outbreak-associated. For comparison, 16 outbreaks were reported during 2024 and 69% of cases (198 of 285) were outbreak-associated.
*CDC is aware of probable measles cases being reported by jurisdictions. However, the data on this page only includes confirmed cases jurisdictions have notified to CDC.
**CDC reports the cumulative number of measles outbreaks (defined as 3 or more related cases) that have occurred this year in the U.S.; states have the most up-to-date information about cases and outbreaks in their jurisdictions.
Real-time measles updates from states
Find more real-time updates of measles cases reported by:
Arizona Department of Health Services
Pennsylvania Department of Health
Utah Department of Health and Human Services
Virginia Department of Health
Outbreak recommendations issued by health departments:
For Providers: Utah Department of Health and Human Services
For Providers: Virginia Department of Health
U.S. Cases
U.S. Cases
2026
To date
2025
Full year
Total Cases
2,318
2,289
Age
Under 5 years
456 (20%)
584 (26%)
5-19 years
1,141 (49%)
1,017 (44%)
20+ years
709 (31%)
675 (29%)
Age unknown
12 (1%)
13 (1%)
Vaccination Status
Unvaccinated or Unknown
93%
93%
One MMR dose
3%
3%
Two MMR doses
4%
4%
U.S. Hospitalizations
U.S. Hospitalizations
2026
2025
Total Hospitalized
7%
(151 of 2,318 cases)
11%
(243 of 2,289 cases)
Percent of Age Group Hospitalized
Under 5 years
10% (45 of 456)
18% (106 of 584)
5-19 years
3% (38 of 1,141)
6% (58 of 1,017)
20+ years
10% (68 of 709)
12% (79 of 675)
Age unknown
0% (0 of 12)
0% (0 of 13)
U.S. Deaths
U.S. Deaths
2026
2025
Total Deaths
0
3
Note: The total number of cases includes cases among international visitors to the U.S.
Weekly measles cases by rash onset date
2022–2026* (as of July 23, 2026)
Skip Over Chart ContainerUse Tab to navigate between left handle, selection, and right handle. Use Arrow keys to adjust. Hold Shift for larger steps. Press Home to move to start, End to move to end.Skip Data TableData TableSkipped data table.
*2025–2026 case counts are preliminary and subject to change.
Map of measles cases among U.S. residents
as of July 23, 2026
202620252024Skip Over Map ContainerSkip Data TableData TableSkipped data table.
Yearly measles cases
as of July 23, 2026
2000-Present*1985-Present*Skip Over Chart ContainerSkip Data TableData TableSkipped data table.
*2025–2026 case counts are preliminary and subject to change.
MMR vaccine coverage for kindergarteners by school year (2009–2025)
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 92.5% in the 2024–2025 school year, leaving approximately 286,000 kindergartners at risk during the 2024–2025 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.
2024-252023-242022-232021-222020-212019-202018-192017-182016-172015-162014-152013-142012-132011-122010-112009-10Skip Over Map ContainerSkip Data TableData TableSkipped data table.Note: For the 2024-2025 school year, Florida, Georgia, Iowa, Mississippi, New Hampshire, and New Jersey did not assess coverage for individual vaccines.
What to know about measles cases & outbreak data
Expand All
How does CDC collect and report data on measles cases and outbreaks?
State, local, tribal, and territorial health departments lead measles case and outbreak investigations. States notify CDC of measles cases reported in their jurisdictions and may request appropriate assistance from CDC to help with their investigations.
On this page CDC publishes:
National measles case counts, including the total number of measles cases reported among international visitors to the United States. Cases are assigned to a year based on the epidemiological week of the date of rash onset. For example, cases with a rash onset date occurring during the last epidemiological week of 2025 (December 28, 2025, through January 3, 2026) are included in the 2025 case counts.
Demographic and clinical data using the national total.
The number of confirmed measles cases among U.S. residents in each jurisdiction.
The cumulative number of measles outbreaks (defined as 3 or more related cases) that have occurred this year in the United States.
Why do state case counts on this webpage differ from the numbers posted on state health department websites?
State jurisdictions and CDC publicly report measles cases on their respective websites on different schedules. CDC is aware of probable measles cases being reported by jurisdictions, but updates on this webpage reflect only confirmed measles cases notified to CDC as of noon on Thursdays. States may report three or more linked cases in their state as an outbreak, but CDC may not report it as a distinct outbreak if these cases are associated with a previously reported outbreak.
Why is there more measles activity?
Measles was declared eliminated in the United States in 2000. This was thanks to a very high percentage of people receiving the safe and effective measles, mumps, and rubella (MMR) vaccine. In recent years, however:
U.S. national MMR coverage among kindergarteners has decreased and is now below the 95% coverage target—with much lower coverage in some communities.
Global measles activity is increasing, meaning more chances of an unvaccinated person infected with measles abroad returning to the United States.
Measles is not a seasonal virus. However, measles is often spread over times of high travel (like spring break, summer, or during holidays) or in situations where unvaccinated persons are in close quarters (like summer camp).
Keep Reading
History of Measles
Where are there current outbreaks of measles in the United States?
CDC publishes the cumulative number of measles outbreaks, defined as 3 or more related cases, that have occurred in the United States. Some states may have had multiple measles outbreaks, and a single reported multistate outbreak may have related cases reported in several states. States have the most up-to-date information about cases and ongoing outbreaks in their jurisdictions.
How do measles outbreaks happen in the United States?
Measles is very contagious. It spreads through the air when an infected person coughs or sneezes. You can get measles just by being in a room where a person with measles has been. While measles has been eliminated in the United States since 2000, it is still common in many parts of the world.
Every year, measles is brought into the United States by travelers who get measles while they are in other countries. Travelers who are infected with measles can bring it back to the United States and spread it to other people who are not protected. These travelers are usually unvaccinated U.S. residents who travel internationally. Far less frequently, they are international visitors. Few cases this year have been reported among international visitors.
A measles outbreak is defined as 3 or more related cases. Most outbreaks in the United States are small, comprised of 6 people or fewer, usually within a household. When measles gets into a community that has lower vaccination rates it can spread quickly, causing larger outbreaks.
Keep Reading
Plan for Travel
Why are some vaccinated people getting measles?
Two doses of MMR vaccine are 97% effective at preventing measles, 1 dose is 93% effective. It is uncommon for someone who is vaccinated to develop measles. However, breakthrough infections (when someone becomes infected after they have been vaccinated) can occur, especially in communities experiencing an outbreak where high levels of measles virus are circulating. The number of breakthrough infections is consistent with what we have seen in previous years (approximately 10% of all measles infections).
How does CDC assess measles outbreak risk?
CDC is creating models to show how measles outbreaks could occur and spread in the United States. These models can be used to help health departments better identify communities at highest risk and manage healthcare resources.
Keep Reading
Measles Outbreak Simulator
Why does CDC combine data on cases reported in people with 'unvaccinated' or 'unknown' MMR vaccination status?
The purpose of this webpage is to provide timely information to the public about confirmed measles cases in the United States. The data presented on this page show the portion of reported measles cases in people that lacked documentation of measles, mumps, and rubella (MMR) vaccination and cases in people who had documentation of MMR vaccination, and the number of doses they received.
Jurisdictions investigating measles cases assign 'unvaccinated' status to people with no record of MMR vaccination in the state's immunization registry. 'Unknown' vaccination status is assigned to people for whom immunization history or information is unavailable. Some jurisdictions initially report confirmed cases in these two categories combined, to more efficiently estimate the portion of the population that may not have immunity to measles.
CDC receives reports of confirmed measles cases from state, territorial, and other public health departments. When CDC compiles confirmed cases to publish on this page, it combines the cases in people with 'unvaccinated' status and 'unknown' vaccination status into one category. When CDC publishes detailed reports and summaries, it publishes data on unvaccinated and unknown categories separately.
Keep Reading
Measles Update — United States, January 1–April 17, 2025
How serious is measles?
Measles is an extremely infectious, and potentially severe rash illness. Before the measles vaccine was introduced, an estimated 48,000 people were hospitalized and 400–500 people died in the United States each year.
Keep Reading
Measles Symptoms and Complications
How do I protect myself?
The best way to protect yourself against measles is with the measles, mumps, and rubella (MMR) vaccine. Talk to your healthcare provider about vaccination, especially if planning to travel.
Keep Reading
Measles Vaccination
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.
Reported Measles Cases in the United States from 1962-2026*Skip Over Chart ContainerSkip over annotationsSkip Data TableData TableSkipped data table.Annotations
Previous years
Expand All
2024
As of December 31, 2024, a total of 285 measles cases were reported in the U.S. Among these, 269 of the measles cases were reported by 32 jurisdictions: Arizona, California, District of Columbia, Florida, Georgia, 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. A total of 16 measles cases were reported among international visitors to the U.S.
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 2024
U.S. Cases in 2024
Total 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 2024
U.S. Hospitalizations in 2024
40%
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
From January 1 to December 31, 2023, a total of 59 measles cases were reported by 20 jurisdictions: California, Colorado, District of Columbia, Florida, Hawaii, Idaho, Illinois, Kentucky, Maryland, Missouri, New Jersey, New York City, Ohio, Oregon, Pennsylvania, Texas, Utah, Virginia, Washington, and Wisconsin.
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2022
From January 1 to December 31, 2022, a total of 121 measles cases were reported by 6 jurisdictions. *
For more information, please see the following report:
Notes from the Field: Measles Outbreak — Central Ohio, 2022–2023. MMWR. August 4, 2023
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2021
From January 1 to December 31, 2021, a total of 49 measles cases were reported by 5 jurisdictions. *
For more information, please see the following report:
Public Health Actions to Control Measles Among Afghan Evacuees During Operation Allies Welcome — United States, September–November 2021. MMWR. April 29, 2022
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2020
From January 1 to December 31, 2020, 13 individual cases of measles were confirmed in 8 jurisdictions.*
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2019
From January 1 to December 31, 2019, 1,274 individual cases of measles were confirmed in 31 states.
The majority of cases were among people who were not vaccinated against measles. Measles is more likely to spread and cause outbreaks in U.S. communities where groups of people are unvaccinated.
For more information, please see the following reports:
Increase in Measles Cases – United States, January 1-April 26, 2019. MMWR. May 3, 2019
National Update on Measles Cases and Outbreaks – United States, January 1-October 1, 2019. MMWR. October 11, 2019
National Update on Measles Cases and Outbreaks — United States, January 1–October 1, 2019. MMWR. October 11, 2019
Notes from the Field: Community Outbreak of Measles — Clark County, Washington, 2018–2019. MMWR. May 17, 2019
Notes from the Field: Measles Outbreaks from Imported Cases in Orthodox Jewish Communities — New York and New Jersey, 2018–2019. MMWR. May 17, 2019
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2018
From January 1 to December 31, 2018, 381 individual cases of measles were confirmed in 28 jurisdictions.*
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2017
For more information, please see the following report:
Measles Outbreak — Minnesota April–May 2017. MMWR. July 14, 2017
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2016
For more information please see the following reports:
Notes from the Field: Measles Outbreak at a United States Immigration and Customs Enforcement Facility — Arizona, May–June 2016. MMWR. May 26, 2017
Measles Outbreak of Unknown Source — Shelby County, Tennessee, April–May 2016. MMWR. September 30, 2016
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2015
For more information please see the following reports:
Measles — United States, January 4–April 2, 2015. MMWR. April 17, 2015
Measles Outbreak — California, December 2014–February 2015. MMWR. Feb 20, 2015
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2014
For more information please see the following reports:
Measles Outbreak in an Unvaccinated Family and a Possibly Associated International Traveler — Orange County, Florida, December 2012–January 2013. MMWR. Sep 12, 2014
Notes from the Field: Measles in a Micronesian Community — King County, Washington, 2014. MMWR. Sep 12, 2014
Measles — United States, January 1–May 23, 2014. MMWR May 29, 2014
Notes from the Field: Measles — California, January 1–April 18, 2014. MMWR. Apr 25, 2014
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
2013
For more information please see the following reports:
Measles — United States, January 1-August 24, 2013. MMWR. Sep 13, 2013
Notes from the field: Measles outbreak among members of a religious community — Brooklyn, New York, March–June 2013. MMWR. Vol 62, No 36;752-3 09/13/2013
Notes from the field: Measles outbreak associated with a traveler returning from India — North Carolina, April–May 2013. MMWR. Vol 62, No 36;753
*Jurisdictions refer to any of the 50 states, New York City, and the District of Columbia.
Learn more
Wastewater Data for Measles
What can wastewater data for measles tell us?
History of Measles
Learn the history of measles, from the pre-vaccine era to measles elimination.
Questions About Measles
Get answers to questions about protecting against measles, measles vaccine and how measles spreads.
Release Notes
Expand All
May 8, 2026
1. History of Measles Visual Update
The History of Measles section has been updated to include an interactive, annotated chart rather than a static image. This chart includes data from 1962 to present and will be updated each week. If accessing on a smartphone, the detailed annotations are visible in the expandable "Annotations" section below the chart.
Measles Resources
July 24, 2026
Sources
Share
Content Source:
National Center for Immunization and Respiratory Diseases; Division of Viral Diseases
Back to Top
