Public Health Measles 2026
CDC Confirms Six Measles Deaths in 2026 as States Count at Least Eight — Why the Numbers Differ and Who Is Most at Risk
The federal toll is double 2025’s, cases have passed 5,000 for the first time since 1991, and a regional panel is weighing whether the U.S. is still measles-free. Here is what the data show and how to check your family’s protection.
By The Health DeskFact-checked against CDC data, state health departments, a Congressional Research Service report and Reuters reportingUpdated November 13, 2026Scope United States, 2025 to 2026
For two decades, measles deaths in the United States were so rare that each one made national news. This year, they are arriving in clusters. A 7-month-old in rural northern New York. An infant in southwestern Wisconsin. Six people in Pennsylvania, at the center of the country’s largest outbreak. On Thursday, November 12, 2026, the Centers for Disease Control and Prevention updated its website to list six measles-related deaths so far this year.
That number is already disputed. State health department reports add up to at least eight, and the gap reflects a change in how the federal government counts. Meanwhile, the CDC has recorded 5,182 confirmed cases across 47 jurisdictions as of November 5, Reuters and Xinhua reported, the first time annual cases have topped 5,000 since 1991. For families, the more useful question is not which tally is right. It is whether everyone in the household has the two vaccine doses that prevent almost all of this.
What We Know
- The CDC lists six measles-related deaths in 2026, double 2025’s three.
- Pennsylvania has confirmed six measles-associated deaths; New York and Wisconsin have each reported one.
- Cases reached 5,182 by November 5, the highest annual total since 1991.
- A Pan American Health Organization panel began meeting this week on U.S. elimination status.
What Is Still Unclear
- Which states account for the CDC’s six deaths; the agency did not say.
- Whether the CDC will later add the deaths missing from its count.
- The outcome of the PAHO review, expected in the coming days.
- Ages and vaccination status for all of the people who died.
A Death Toll That Depends on Who Is Counting
Until this year, the CDC counted measles deaths using reports from state health departments. Under Health Secretary Robert F. Kennedy Jr., the agency switched to National Center for Health Statistics mortality data, which come from death certificates, Reuters reported. Death certificate data can lag, and they depend on how physicians record the cause of death. Reuters also reported that Kennedy asked CDC Director Erica Schwartz not to count two Pennsylvania deaths, arguing without evidence that they may not have been caused by measles. HHS did not immediately respond to Reuters’ request for comment.
Measles Deaths by Source
The CDC said it is working with the Council of State and Territorial Epidemiologists on a standardized case definition for measles-related deaths so jurisdictions count them the same way, Xinhua reported. Until that happens, expect the federal and state numbers to keep diverging. Neither changes the underlying picture: the 2026 toll is the highest the country has seen in more than three decades.
Who Died
New York’s death was an unvaccinated 7-month-old in the rural north of the state, announced November 2, the state’s first measles death in about 30 years, according to Healio. Wisconsin announced an infant’s death in the state’s southwest on November 5, its first in 36 years. In Pennsylvania, the first two deaths, in Lancaster County, were announced August 25. Two more, in Jefferson and Mifflin counties, followed on September 15; the state said both people were unvaccinated. Two further deaths brought the state’s total to six by early November.
The Worst Measles Year in a Generation
Measles was declared eliminated in the United States in 2000, meaning the virus no longer spread continuously within the country for a year or more. The current wave began in Texas in early 2025 with two imported cases, according to an analysis published in The Lancet and summarized by CIDRAP. The country recorded 2,289 cases and three deaths in 2025, the Congressional Research Service reported. The 2026 count has already more than doubled that.
U.S. Measles Cases by Year
Where the Virus Is Spreading Fastest
Pennsylvania is the epicenter, with 1,487 cases, according to CIDRAP’s November tally. The state’s outbreak began in late April, and by mid-September it had spread to 38 counties and led to 141 hospitalizations, the Pennsylvania Department of Health said. Wisconsin reports 477 cases, a 35-year high, with more than 99% of patients unvaccinated and about 85% of cases tied to an outbreak in the southwest of the state. Ohio, New York, Kentucky, Minnesota and Indiana have also reported more than 100 cases each.
States With the Most 2026 Measles Cases
Why Measles Kills, and Who Is Most Vulnerable
Measles is one of the most contagious diseases known. The Pennsylvania Department of Health notes the virus can stay infectious in the air and on surfaces for up to two hours after an infected person leaves a room. Symptoms begin 7 to 21 days after exposure with fever, cough, runny nose and red, watery eyes, followed by a rash that starts on the head. Nearly 20% of people who get measles are hospitalized, and one to three of every 1,000 patients die, the department says.
Infants are at particular risk because the first routine MMR dose is not given until 12 to 15 months of age, leaving babies dependent on the immunity of those around them. Complications include pneumonia, the most common cause of measles death in children, and encephalitis, or brain swelling. Measles can also weaken the immune system for months after recovery, a phenomenon researchers call immune amnesia.
The Vaccination Gap Behind the Outbreaks
Two doses of MMR vaccine provide about 97% protection. The Congressional Research Service reported that kindergarten MMR coverage fell to 92.4% in the 2025 to 2026 school year, down from a peak of 95.2% in 2019 to 2020, while exemptions reached a record 4.2%. Experts estimate 95% coverage or higher is needed to stop sustained spread. Local pockets are much lower: some West Texas outbreak counties had coverage as low as 77.3%.
MMR Coverage and the Herd Immunity Line
Check Your Family’s Protection
The table below summarizes standard CDC vaccination guidance for common situations. Your doctor or pharmacist can review your records and advise on your specific case, including during travel or a local outbreak.
| Your situation | Protection level | Recommended action | Timing | Notes |
|---|---|---|---|---|
| Two documented MMR doses | About 97% | No further dose needed | None | Keep records handy |
| One documented dose | About 93% | Ask about a second dose | At least 28 days after the first | Common in adults vaccinated decades ago |
| No records found | Unknown | Get vaccinated or a blood test | As soon as possible | Extra doses are considered safe |
| Child 12 months to 6 years | Building | First dose at 12 to 15 months, second at 4 to 6 years | Routine schedule | Second dose can be given early in outbreaks |
| Infant 6 to 11 months | Low | Early dose before international travel or in some outbreaks | Ask your pediatrician | Two routine doses still needed later |
| Born before 1957 | Presumed immune | Generally none | None | Health care workers may need proof |
| Exposed and unvaccinated | At risk | MMR within 72 hours or immune globulin within 6 days | Call a doctor immediately | Call ahead before visiting a clinic |
| Pregnant or severely immunocompromised | Cannot receive MMR | Immune globulin if exposed | Within 6 days of exposure | Relies on others being vaccinated |
The one-dose effectiveness figure of about 93% and the post-exposure windows above reflect long-standing CDC guidance rather than this year’s outbreak data. Policies around MMR have also become a federal flashpoint. An August 10, 2026, executive order kept the measles vaccine recommendation but said MMR should be given in three separate single-disease shots once such products are domestically available, according to the Congressional Research Service. The order’s wording acknowledges such single-disease products are not yet available domestically, and the CDC’s own page says there is no published evidence that separating the shots provides any benefit.
- Find your recordsCheck your state immunization registry, your doctor’s office or old school records for MMR dates.
- Count the dosesTwo documented doses mean you are protected; one dose or none means talk to a provider.
- Vaccinate children on scheduleFirst dose at 12 to 15 months and second at 4 to 6 years, or earlier if your doctor advises.
- Know the early signsHigh fever, cough, runny nose and red eyes, followed 3 to 5 days later by a rash, warrant a call to a doctor.
- Call before you goIf you suspect measles, phone your clinic or emergency room first so staff can prevent spread in waiting rooms.
Is the U.S. About to Lose Its Measles-Free Status?
A country keeps measles elimination status only if it can show the virus has not spread continuously for 12 months or more. The Lancet analysis found the U.S. had already failed four of seven key indicators and estimated the virus’s reproduction rate stayed above 1 on 285 of 376 days studied, CIDRAP reported. Its authors concluded it “appears highly likely” the U.S. would lose its status in 2026. Canada lost its status in late 2025.
- 2000Measles declared eliminated in the United States.
- Early 2025Outbreak begins in Texas with two imported cases.
- 2025Year ends with 2,289 cases and 3 deaths.
- Late 2025Canada loses its measles elimination status.
- Late April 2026Pennsylvania outbreak begins.
- Aug. 25, 2026Pennsylvania reports the nation’s first 2 confirmed measles deaths of 2026.
- Sept. 15, 2026Pennsylvania confirms deaths 3 and 4, both unvaccinated.
- Nov. 2, 2026New York announces an unvaccinated 7-month-old’s death.
- Nov. 5, 2026Wisconsin announces an infant’s death; U.S. cases reach 5,182.
- Nov. 10, 2026PAHO commission begins a 4-day review of U.S. status.
- Nov. 12, 2026CDC lists 6 measles-related deaths for 2026.
Losing elimination status would not change what doctors recommend or what individuals should do. It would mean measles is again considered endemic, circulating on its own rather than arriving through occasional imports. “I think it has gained a foothold,” vaccine expert Dr. Paul Offit told Healio. Dr. Aaron Glatt added: “It’s shocking that people aren’t getting vaccinated.” HHS spokesperson Emily Hilliard told Healio the CDC has provided about $100 million in additional funding to states.
What Pennsylvania’s Response Shows
Outbreak response can move vaccination rates quickly. Pennsylvania’s health department said it held 140 pop-up clinics in affected communities by mid-September and that providers gave more than 46,000 MMR doses in August 2026, compared with about 25,000 in a typical month. That surge shows how many people respond once the threat feels close. Health officials hope that response will come earlier in other communities.
- Two MMR dosesAbout 97% protection
- First dose12 to 15 months
- Second dose4 to 6 years
- After exposureMMR within 72 hours
- Incubation7 to 21 days
- AirborneInfectious up to 2 hours
Frequently Asked Questions
How many people have died of measles in the U.S. in 2026?
The CDC lists six measles-related deaths as of November 12, 2026. State health department reports total at least eight: six in Pennsylvania and one each in New York and Wisconsin.
Why are CDC and state measles death counts different?
The CDC switched from state reports to National Center for Health Statistics death certificate data, which can lag and classify causes differently. The CDC is developing a standard definition with state epidemiologists.
How many measles cases are there in the U.S. in 2026?
The CDC reported 5,182 confirmed cases across 47 jurisdictions as of November 5, 2026, the most since 1991.
Which state has the most measles cases?
Pennsylvania, with 1,487 cases in early November, followed by Wisconsin with 477 and Ohio with 311.
How effective is the MMR vaccine?
Two doses are about 97% effective at preventing measles, and protection is considered lifelong.
Do adults need a measles booster?
Adults with two documented doses do not need another. Those with one dose or no records should talk to a doctor or pharmacist.
Will the U.S. lose its measles elimination status?
A PAHO commission began reviewing U.S. status on November 10, 2026. A Lancet analysis concluded it appears highly likely the U.S. will lose it this year.
What should I do if I was exposed to measles?
Call your doctor right away. Unvaccinated people may be protected by an MMR dose within 72 hours or immune globulin within six days. Call before visiting so staff can prevent spread.
The Short Version
The CDC now lists six measles-related deaths in 2026, double last year’s, while state reports count at least eight: six in Pennsylvania, one in New York and one in Wisconsin. The gap stems partly from the CDC’s switch to death-certificate data. Cases reached 5,182 by November 5, the most since 1991, and 96% of patients were unvaccinated or had unknown status. Two MMR doses provide about 97% protection. Check your family’s records, vaccinate children on schedule and call a doctor before visiting if measles is suspected.
Omisha is a health writer passionate about turning complex medical research into clear, actionable content readers can trust. She covers everything from nutrition and mental wellness to chronic disease management, always grounding her work in credible science and real-world relevance. When she's not writing, she's usually reading up on the latest health studies or exploring new wellness trends to write about next.
