US Loses Measles-Free Status After 26 Years as PAHO Revokes Elimination

The United States has lost its measles-free status after 26 years. The Pan American Health Organization (PAHO) has revoked America's measles elimination status because the virus has now spread without interruption for more than a year, the Wall Street Journal reported on Friday, in the starkest measure yet of the country's worst measles outbreak in more than three decades.

The decision, reported on November 13, 2026, ends a milestone held since 2000. Cases in 2026 have passed 5,000 for the first time since 1991, with about 7,500 Americans infected and 13 dead since the start of 2025. PAHO, the Americas branch of the World Health Organization, concluded that the same measles strain had circulated in the United States for 12 months or longer.

Key Points

• PAHO revoked the United States' measles elimination status after 26 years, the Wall Street Journal reported on Friday, November 13, 2026.
• The United States failed to halt continuous transmission for more than a year, the test for keeping elimination status.
• Confirmed measles cases in 2026 reached 5,412 as of November 12, up from 5,182, with cases in 45 states, New York City and the District of Columbia.
• About 7,500 people have been infected and 13 have died since 2025, the highest numbers in more than three decades.
• The decision came days early: the PAHO verdict had been expected on Monday, November 17.

What Happened

PAHO's decision was reported by the Wall Street Journal on Friday, citing people familiar with the matter. PAHO reviewed epidemiological and laboratory evidence to judge whether the same measles strain had circulated in the United States without a break for 12 months or longer.

The evidence pointed to a single chain of transmission that began with the Texas outbreak in January 2025 and spread through Utah into at least four other states, carried by the D8-9171 strain. That unbroken chain cost the United States its status. The timing surprised health officials: the PAHO verification commission met in Washington from November 10 to 13, but the decision had been expected on Monday, November 17.

Measles Elimination Status: What the Status Means

Measles elimination status does not mean the virus has vanished. It means a country has interrupted endemic transmission, with no home-grown strain circulating for at least 12 months, and keeps surveillance strong enough to catch imported cases. The United States achieved that status in 2000 and held it for 26 years.

Keeping it depends on herd immunity: a country halts transmission when about 95 per cent of its population is vaccinated. Kindergarten MMR coverage now stands at 92.4 per cent, and about 96 per cent of this year's cases have been in people who were unvaccinated or whose vaccination status was unknown. Losing the status carries no sanctions or travel bans. Regaining it requires a full year of interrupted transmission.

Background: A Year of Unbroken Spread

The outbreak that ended the 26-year run began in Texas in January 2025 and spread from state to state. By November 2026, the CDC had confirmed 5,412 cases across 47 jurisdictions, with 591 hospitalised. Children under five were hospitalised at 17 per cent, and adults aged 20 and over at 15 per cent. Pennsylvania remains the epicentre, with 1,505 cases as of November 9 and six deaths across 44 counties.

The CDC has confirmed six measles-related deaths in the United States in 2026, double the three recorded in all of 2025, although state health departments report at least eight: six in Pennsylvania, one in New York and one in Wisconsin. The toll since the start of 2025 stands at 13 deaths, alongside roughly 7,500 infections. The resurgence coincides with falling immunisation rates and rising vaccine hesitancy. Reuters noted that the period overlaps with the tenure of Health Secretary Robert F. Kennedy Jr., who has for years spread doubts, without scientific evidence, about the safety of measles vaccines. Two doses of the MMR vaccine provide 97 per cent protection against the virus, which can cause blindness, deafness, brain damage or death. Cases had already passed 5,000 in the CDC's latest update, and the PAHO review was expected to decide the status this month.

Reactions and Quotes

PAHO did not immediately respond to Reuters' request for comment, and neither the CDC nor the Department of Health and Human Services had issued a public statement by Friday.

Dr Thomas Lew of Stanford University, reacting to the CDC's figures this week, called six deaths from "an entirely preventable disease" "a travesty of our public health system". Wisconsin health secretary Kirsten Johnson, announcing the death of an infant in her state earlier this month, said: "Any death of a child is a tragedy and even more so when it is related to a vaccine-preventable disease."

Why It Matters

Measles is one of the most contagious viruses known to medicine. An infected person can spread it through the air for up to two hours after leaving a room, and nine in ten unvaccinated people exposed to it will catch it. That is why the 95 per cent coverage threshold matters so much.

The loss of elimination status is also a signal to the rest of the world. The United States led the global push to eliminate measles, and its status was a benchmark for the Americas. The CDC confirmed this week that deaths in 2026 have doubled the 2025 total, and every one of them was preventable.

What Happens Next

PAHO is expected to confirm the decision formally in the coming days, with the detailed evidence behind it. The CDC will continue its weekly case updates, and the next ones will show whether the outbreak is still growing or beginning to slow.

State health departments are expected to step up catch-up vaccination campaigns, particularly where coverage has fallen furthest. The task now is to break the chain of transmission. The earliest the United States could recover the status would be late 2027.

Frequently Asked Questions

What does losing measles elimination status mean?

It means PAHO has concluded that measles has circulated continuously in the United States for 12 months or longer, so the virus is no longer considered eliminated. Home-grown transmission has resumed.

Does the decision bring sanctions or travel restrictions?

No. Losing elimination status carries no sanctions, fines or travel bans. It is a public-health classification that signals the country's control of the virus has slipped.

Can the United States get the status back?

Yes, but it takes time. The country must show a full year with no uninterrupted home-grown transmission, backed by laboratory evidence. The earliest realistic date would be late 2027.

How effective is the MMR vaccine?

Two doses of the MMR vaccine provide about 97 per cent protection against measles, and one dose provides about 93 per cent. It is, by far, the best way to prevent infection and transmission.

Why have measles cases risen so sharply?

Cases have risen because vaccination coverage has fallen below the 95 per cent needed for herd immunity, down to 92.4 per cent among kindergarten children. About 96 per cent of this year's cases have been in people who were unvaccinated or whose vaccination status was unknown.