America’s measles comeback: how vaccine gaps turned 2025 into the worst year in decades
Force in Play
Pennsylvania's outbreak nears 1,400 cases and five deaths, the U.S. toll tops 4,800, and New York records its first measles death in more than 30 years.
U.S. measles cases reached 4,852 through Oct. 29, more than double the 2,289 recorded in all of 2025, with weekly growth rising to 5.8% and 511 hospitalizations. Pennsylvania's outbreak now stands at 1,398 cases, 265 hospitalizations and five deaths, the largest state outbreak since the early 1990s.
New York, which declared a measles disaster in October, reported its first measles death in more than 30 years on Nov. 2. The Pan American Health Organization was preparing in late October to strip the U.S. of the elimination status it has held since 2000, while the CDC's national count of three measles deaths remains below the five Pennsylvania reports on its own.
Why it matters
Measles can hospitalize and kill children, and falling vaccination rates have let a once-eliminated disease return to record levels.
Questions about this story
Free account needed to ask — your question is kept and asked for you right after sign-up. Answers are public.
No questions yet — be the first to ask.
Key Indicators
4,852
U.S. measles cases in 2026 (through Oct. 29)
Worst year since 1991, per CDC, and the highest U.S. count in 35 years as reported Nov. 6. Weekly growth rose to 5.8%, with 511 hospitalizations and more than 800 cases in children under 5.
5
Measles deaths reported in Pennsylvania in 2026
State health officials report five deaths, 265 hospitalizations and cases in 43 counties. The CDC's national count for the year is three.
1,398
Pennsylvania cases in 2026
Largest state outbreak in more than three decades, as of Oct. 30. Lancaster County is the epicenter with 493 cases; Mifflin has 205.
997
South Carolina cases in 2026
State health department count as of late October, one of the nation's largest totals, rooted in the Upstate cluster that began in 2025.
92.4%
U.S. kindergarten MMR coverage (2025-26)
Below the 95% herd-immunity benchmark. Twenty-three states report coverage below 91%; only 10 are above 95%.
76%
Americans calling measles vaccine safe
Down from 84% in 2020, per Reuters/Ipsos. Republicans showed the sharpest drop in vaccine confidence.
Voices
Curated perspectives — historical figures and your fellow readers.
Sign up to generate historical perspectives on this story.
27 events
Latest: 5 days ago
Showing 8 of 27
JK to step
Tap a bar to jump to that date
Jump to
November 2026
U.S. Measles Count Reported as Highest in 35 Years
LatestData
France24 reported that the United States had recorded its highest number of measles cases in 35 years, as the 2026 total stayed above 4,800 with two months left in the year.
New York Reports First Measles Death in More Than 30 Years
Milestone
New York recorded its first measles death in more than 30 years, NBC News reported, weeks after the state declared a measles disaster and with more than 160 confirmed cases.
October 2026
PAHO Prepares to Strip U.S. Measles Elimination Status
Milestone
The Pan American Health Organization was preparing to revoke the U.S. measles elimination designation, as national MMR coverage sat at 92.4% and cases passed 4,800 with two months left in 2026.
CDC: 4,852 Cases, Weekly Growth Rises to 5.8%
Data
The CDC reported 4,852 measles cases through Oct. 29, up 5.8% in a week, with 511 hospitalizations and more than 800 cases in children under 5.
Pennsylvania Reaches 1,398 Cases, Five Deaths
Outbreak
State figures cited by Reuters showed 1,398 Pennsylvania measles cases, 265 hospitalizations and five deaths across 43 counties; CIDRAP later put the case count at 1,426.
Pennsylvania Outbreak Becomes Largest State Outbreak in Decades
Outbreak
Pennsylvania's health department reported 1,004 measles cases, the largest state outbreak in more than three decades and part of the worst U.S. year since 1991. By Oct. 30 the state count had reached 1,398.
September 2026
U.S. Measles Deaths Reach Highest Level in Decades
Milestone
Pennsylvania confirmed two more measles deaths, raising its 2026 state total to four and pushing U.S. fatalities to the highest level in decades.
Poll: Trust in Measles Vaccine Falls to 76%
Analysis
A Reuters/Ipsos poll found 76% of Americans call the measles vaccine safe for children, down from 84% in 2020; 19% approve of the administration's handling of the outbreak.
August 2026
CDC: Kindergarten MMR Coverage Slips to 92.4%
Data
Two-dose coverage before the 2025-26 school year fell below the 95% herd-immunity benchmark; 23 states reported coverage below 91%.
March 2026
Utah Parents Rush to Vaccinate as Outbreak Spreads
Response
TriCounty saw a 500% increase in children receiving MMR versus March 2025 after officials asked schools to keep unvaccinated students home. Utah recorded 724 cases since the June 2025 outbreak began.
February 2026
Youth Wrestling Tournament Spreads Utah Outbreak
Outbreak
TriCounty reported 80 cases, many traced to a February youth wrestling tournament that carried the virus into schools and households.
December 2025
AP: Dual Outbreaks in South Carolina and Arizona–Utah Illustrate National Crisis
Analysis
The Associated Press highlights Spartanburg County and the Colorado City–Hildale cluster as emblematic of 2025’s measles resurgence and the risk of the U.S. losing its elimination status.
Spartanburg County Outbreak Hits 111 Cases; Schools Reel
Outbreak
South Carolina officials report 111 confirmed cases, mostly tied to Way of Truth Church in Inman, with students from nine schools and more than 250 people now quarantined.
CDC Counts 1,912 U.S. Measles Cases, 47 Outbreaks
Data
The national case tally nears 2,000, with 47 distinct outbreaks and infections reported in 43 states, making 2025 the worst measles year since the early 1990s.
November 2025
Americas Region and Canada Lose Measles Elimination Status
Milestone
WHO and regional bodies confirm that continued outbreaks have cost Canada and the broader Americas measles elimination status, underscoring how fragile the designation is.
October 2025
Mohave County Reaches 80 Cases, Hospitalizations Climb
Outbreak
Arizona and Utah officials report at least 80 cases in Mohave County and 43 in neighboring Utah, with eight hospitalizations and some of the lowest vaccination rates in either state.
South Carolina Declares Upstate Measles Outbreak
Outbreak
State health officials label three or more linked cases an outbreak after infections emerge around Spartanburg, some with no obvious source, indicating community circulation.
September 2025
Colorado City–Hildale Cluster Takes Off
Outbreak
Arizona public radio reports 24 cases in Colorado City and eight in southwest Utah, mostly among children in FLDS communities where one school’s MMR rate was just 7%.
August 2025
First Measles Case Confirmed on Arizona–Utah Border
Outbreak
Mohave County reports an unvaccinated resident with no travel history, with exposures across Arizona and Utah, signaling homegrown spread in a severely under‑vaccinated community.
July 2025
CDC Confirms Highest Measles Tally Since Elimination
Data
New CDC data show 1,288 cases, 92% in unvaccinated or unknown‑status people, mostly linked to the Southwest outbreak, prompting fresh warnings about losing elimination status.
Johns Hopkins Tracker Shows 2025 Surpasses 2019 Record
Data
The U.S. Measles Tracker logs 1,281 cases, topping 2019’s modern‑era record and confirming 2025 as the worst measles year in more than three decades.
April 2025
HHS Secretary Kennedy Orders CDC Surge to Texas
Response
After visiting families of two Texas children killed by measles, Kennedy publicly backs MMR and directs CDC to send more teams, vaccines and supplies to West Texas.
March 2025
U.S. Notifies WHO of Expanding Measles Emergency
Statement
By March 20, officials report 378 cases across 17 states to WHO, many tied to the Texas‑centered outbreak, raising early concerns about elimination status.
2025
Southwest Outbreak Ignites in West Texas Mennonite Community
Outbreak
Measles spreads through an under‑vaccinated Mennonite community in Gaines County, Texas, then into New Mexico and Oklahoma, eventually sickening nearly 900 and killing three unvaccinated people.
October 2019
2019 New York Outbreak Nearly Costs U.S. Elimination Status
Outbreak
Under‑immunized Orthodox Jewish communities in New York drive 934 measles cases, forcing emergency orders and nearly ending the nation’s elimination designation.
January 2015
Disneyland Outbreak Shows Power of Pockets
Outbreak
An unvaccinated child with measles linked to Disneyland sparks a 131‑case multistate outbreak, largely in undervaccinated communities, igniting debate over personal‑belief exemptions.
2000
U.S. Wins “Eliminated” Status for Measles
Milestone
Federal health officials declare measles eliminated in the United States after sustained high MMR vaccination rates, meaning no continuous domestic transmission for over a year.
Scenarios
1
“U.S. Loses Measles Elimination Status in Early 2026 After Yearlong Southwest Transmission”
Possible
Discussed by: WHO advisers, LiveScience, Washington Post, Johns Hopkins measles-tracker analysts
If the chain that began in West Texas and later seeded Arizona and Utah isn’t fully extinguished by roughly January 2026, WHO can rule that endemic transmission has resumed and strip the U.S. of its elimination badge. That outcome would be a symbolic gut‑punch – proof that even a rich country can backslide when vaccination rates drift down and politics muddy the message – and would likely spark calls for tighter school vaccine laws and new federal funding but also fuel further partisan fights.
2
“Backlash After 2025 Outbreaks Drives States to Tighten School Vaccine Mandates”
Possible
Discussed by: State health officials, mainstream medical groups, some state legislators in South Carolina, Arizona, and Texas
One path is the post‑Disneyland playbook: high‑profile outbreaks prompt parents, doctors and school boards to demand fewer loopholes. Lawmakers in states rattled by 2025 clusters could move to roll back broad personal‑belief exemptions, enforce exclusion of unvaccinated kids during outbreaks, and fund catch‑up clinics, especially in rural and religious schools. If a few swing states act – and courts uphold their laws – overall coverage could inch back above 95% in key regions, shrinking but not eliminating the risk of future flare‑ups.
Discussed by: Guardian and AP reporting, vaccine-hesitancy researchers, some skeptical political commentators
The darker scenario is that 2025’s scare fades from headlines while the structural problems stay: politicized vaccine debates, federal leaders sending mixed signals, overworked local health departments, and communities like Colorado City or Way of Truth Church that remain hard to reach. National averages could hover around 92–93% MMR coverage, but with dense clusters far lower, ensuring a steady trickle of outbreaks, school closures, and occasional deaths. Measles wouldn’t explode everywhere – it would just become another recurring American disease, disproportionately hitting children in marginalized or insular groups.
4
New York's Disaster Declaration Marks a Northeast Expansion
Possible
Resolves by Q2 2027
Discussed by: New York state officials, CDC disease trackers
New York declared a measles disaster on October 6, 2026, the first such declaration in the current surge. If New York and its neighbors cannot contain spread, the 2026-27 school year could plant the virus in under-vaccinated communities across the Northeast, spreading the crisis beyond Texas, South Carolina, Utah, and Pennsylvania.
5
Fall 2026 Push Decides Whether Measles Becomes Routine Again
Likely
Resolves by Q1 2027
Discussed by: CDC, state health departments, pediatricians
Kindergarten MMR coverage sits at 92.4% nationally and below 91% in 23 states, with only 28% of U.S. counties above the 95% mark. Pennsylvania's August surge in vaccinations, more than 3,500 MMR doses, and Utah's 500% jump in March show outbreaks can still drive demand. Whether that momentum holds through a full school year will shape 2027.
6
PAHO Formally Revokes U.S. Measles Elimination Status
Likely
Resolves by Q2 2027
Discussed by: Pan American Health Organization, CDC disease trackers, Tech Times reporting
PAHO, the regional body that certifies measles elimination, was preparing in late October to revoke the U.S. designation it has held since 2000. A formal decision would follow the Americas region's loss of status in 2025 and come as 2026 cases passed 4,800 with two months left in the year. It would not change clinical care, but it would end the official claim that measles no longer spreads continuously in the United States.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
1 of 3
2014-12 – 2015-04
2015 Disneyland Measles Outbreak
An infected visitor at Disneyland in California seeded a multistate outbreak that ultimately infected 131 people in California and dozens more in other U.S. states, Canada and Mexico. Most cases were in unvaccinated individuals, many whose parents had declined MMR shots despite easy access.
Then
California declared the outbreak over in April 2015 and saw a surge in demand for MMR shots.
Now
Public outrage helped lawmakers pass California’s SB277, virtually eliminating personal‑belief exemptions for school vaccines.
Why this matters now
It shows how a single exposure in an under‑vaccinated pocket can ignite a national scare – and how outbreaks can catalyze tougher school vaccine rules.
2 of 3
2018-10 – 2019-10
2019 New York and National Measles Resurgence
Large outbreaks in close‑knit Orthodox Jewish communities in New York City and nearby counties produced 1,249 U.S. measles cases in 2019, the highest since 1992. About 89% of patients were unvaccinated or had unknown vaccination status, and transmission in New York nearly lasted long enough to cost the U.S. its elimination status.
Then
New York imposed emergency orders, banned unvaccinated kids from public places, and eventually shut down the outbreaks.
Now
The U.S. barely kept its elimination designation, but the episode foreshadowed how declining coverage could make that status fragile.
Why this matters now
It’s the closest historical near‑miss: a reminder that elimination is a policy achievement, not a biological law, and can be undone by a few under‑immunized communities.
3 of 3
2019-09 – 2020-01
2019 Samoa Measles Disaster
After a vaccine‑handling error killed two infants and shattered public trust, Samoa’s childhood MMR coverage plunged to about one‑third. When measles arrived, it ripped through the island nation, infecting more than 5,700 people out of a population of 200,000 and killing at least 83, mostly babies and young children.
Then
The government declared a state of emergency, shut schools, and ran door‑to‑door mass vaccination drives to stop the epidemic.
Now
By late 2019, vaccination coverage rebounded above 90%, and Samoa now mandates measles immunization for children.
Why this matters now
Samoa is an extreme case of what happens when trust and coverage collapse – and it now shadows U.S. debates because its leaders explicitly blame Robert F. Kennedy Jr.’s earlier vaccine rhetoric.
