Measles

# Measles Cases and Outbreaks ## Measles cases in 2026 ### **Resources for Communities with a Measles Outbreak:** - [There's a Current Outbreak of Measles](https://www.cdc.gov/measles/downloads/measles-factsheet-outbreak-508.pdf) As of October 1, 2026, 3,887 confirmed* measles cases were reported in the United States in 2026. Among these, 3,869 measles cases were reported by 47 jurisdictions: Alabama, Alaska, Arizona, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, 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, West Virginia, Wisconsin, and Wyoming. A total of 18 measles cases were reported among international visitors to the United States. There have been 42 new outbreaks** reported in 2026, and 95% of confirmed cases (3,700 of 3,887) are outbreak-associated (2,316 from outbreaks starting in 2026 and 1,384 from outbreaks that started in 2025). 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 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. ### Outbreak recommendations issued by health departments: #### U.S. Cases | | ##### **2026**<br>To date | ##### **2025**<br>Full year | |-|-|-| | Under 5 years | 683 (18%) | 584 (26%) | | 5-19 years | 1,652 (43%) | 1,018 (44%) | | 20+ years | 1,533 (39%) | 674 (29%) | | Age unknown | 19 (less than 1%) | 13 (1%) | | Unvaccinated or Unknown | 95% | 93% | | Two MMR doses | 3% | 4% | Cases #### U.S. Hospitalizations | | ##### **2026** | ##### **2025** | |-|-|-| | Under 5 years | 14% (96 of 683) | 18% (106 of 584) | | 5-19 years | 4% (67 of 1,652) | 6% (58 of 1,018) | | 20+ years | 12% (189 of 1,533) | 12% (80 of 674) | | Age unknown | 0% (0 of 19) | 0% (0 of 13) | ## Weekly measles cases by rash onset date | Week Start DatePress command, modifier, or enter key to remove the sort from Week Start Date | Weekly casesPress command, modifier, or enter key to sort by Weekly cases in ascending order | |-|-| | September 27, 2026 | 60 | | September 20, 2026 | 143 | | September 13, 2026 | 150 | | September 6, 2026 | 185 | | August 30, 2026 | 169 | | August 23, 2026 | 229 | | August 16, 2026 | 172 | | August 9, 2026 | 175 | | August 2, 2026 | 105 | | July 26, 2026 | 121 | | July 19, 2026 | 44 | | July 12, 2026 | 71 | | July 5, 2026 | 34 | | June 28, 2026 | 29 | | June 21, 2026 | 24 | | June 14, 2026 | 28 | | June 7, 2026 | 33 | | May 31, 2026 | 56 | | May 24, 2026 | 49 | | May 17, 2026 | 29 | | May 10, 2026 | 49 | | May 3, 2026 | 37 | | April 26, 2026 | 38 | | April 19, 2026 | 37 | | April 12, 2026 | 42 | | April 5, 2026 | 34 | | March 29, 2026 | 41 | | March 22, 2026 | 112 | | March 15, 2026 | 93 | | March 8, 2026 | 94 | | March 1, 2026 | 114 | | February 22, 2026 | 127 | | February 15, 2026 | 100 | | February 8, 2026 | 127 | | February 1, 2026 | 89 | | January 25, 2026 | 170 | | January 18, 2026 | 171 | | January 11, 2026 | 296 | | January 4, 2026 | 210 |

# Pennsylvania confirms more than 1,000 measles cases ## Related news [**CDC adds 177 cases to US measles total but has yet to confirm deaths in Pennsylvania**\ \ September 18, 2026\ \ Jim Wappes\ \ ](https://www.cidrap.umn.edu/measles/cdc-adds-177-cases-us-measles-total-has-yet-confirm-deaths-pennsylvania) [**Measles milestones: US closes in on 4,000 cases as Pennsylvania nears 1,000**\ \ October 2, 2026\ \ Jim Wappes\ \ ](https://www.cidrap.umn.edu/measles/measles-milestones-us-closes-4000-cases-pennsylvania-nears-1000) [**Measles outbreaks could leave thousands vulnerable to infectious diseases for years**\ \ October 2, 2026\ \ Liz Szabo\ \ ](https://www.cidrap.umn.edu/measles/measles-outbreaks-could-leave-thousands-vulnerable-infectious-diseases-years) [**Kids hit hard in deadly Jerusalem measles outbreak, report reveals**\ \ October 1, 2026\ \ Mary Van Beusekom\ \ ](https://www.cidrap.umn.edu/measles/kids-hit-hard-deadly-jerusalem-measles-outbreak-report-reveals) [**CDC adds 177 cases to US measles total but has yet to confirm deaths in Pennsylvania**\ \ September 18, 2026\ \ Jim Wappes\ \ ](https://www.cidrap.umn.edu/measles/cdc-adds-177-cases-us-measles-total-has-yet-confirm-deaths-pennsylvania) [**Measles milestones: US closes in on 4,000 cases as Pennsylvania nears 1,000**\ \ October 2, 2026\ \ Jim Wappes\ \ ](https://www.cidrap.umn.edu/measles/measles-milestones-us-closes-4000-cases-pennsylvania-nears-1000) [**Measles outbreaks could leave thousands vulnerable to infectious diseases for years**\ \ October 2, 2026\ \ Liz Szabo\ \ ](https://www.cidrap.umn.edu/measles/measles-outbreaks-could-leave-thousands-vulnerable-infectious-diseases-years) [**Kids hit hard in deadly Jerusalem measles outbreak, report reveals**\ \ October 1, 2026\ \ Mary Van Beusekom\ \ ](https://www.cidrap.umn.edu/measles/kids-hit-hard-deadly-jerusalem-measles-outbreak-report-reveals) [**CDC adds 177 cases to US measles total but has yet to confirm deaths in Pennsylvania**\ \ September 18, 2026\ \ Jim Wappes\ \ ](https://www.cidrap.umn.edu/measles/cdc-adds-177-cases-us-measles-total-has-yet-confirm-deaths-pennsylvania)

# U.S. Measles Outbreaks 2025-2026: Overview and Issues for Congress ## CRS PRODUCT (LIBRARY OF CONGRESS) As of September 24, 2026, the United States has seen the highest number of annual reported measles cases since 1991, according to Centers for Disease Control and Prevention (CDC) [data](https://www.cdc.gov/measles/data-research/index.html). As of [September 24, 2026](https://www.cdc.gov/measles/data-research/index.html), 3,659 confirmed measles cases were reported in the United States in 2026, the highest number of annual cases in 35 years (9,643 cases in 1991). Among all [reported cases](https://www.cdc.gov/measles/data-research/index.html) in both years, over 92% of cases were in people who were unvaccinated or with unknown vaccination status, and over 9% of reported cases resulted in hospitalization.

# Pennsylvania Department of Health Provides Statewide Update on Measles Outbreak as Cases Reach 676 in 37 Counties **Harrisburg, PA –** The **Pennsylvania Department of Health (DOH)** today announced that **676 measles cases have been confirmed across 37 counties in Pennsylvania so far in 2026**. - **New Positive Cases**(since September 9, 2026) **:** 52 - **Measles cases among vaccinated individuals:** 4 _(less than 1% of cases)_ According to the national CDC dashboard, approximately 3 percent of measles cases across the country in 2026 have occurred in fully vaccinated individuals.

10 hours ago · The state has recorded 108 confirmed cases in 2026, prompting local officials to administer more than 1,000 vaccine doses across multiple counties. Measles was ...

1 day ago · ... measles, driven by declining vaccination rates, with case counts soaring in 2026. Across the nation, 3,887 cases have been recorded this year, by far the ...