The United States has lost its measles elimination status, ending a public health achievement it held for 26 years. International health experts determined that measles has spread continuously inside the country for more than 12 months, the threshold for losing the designation.
The decision was reached by an expert panel of the Pan American Health Organization (PAHO), the regional arm of the World Health Organization, after a week of closed-door meetings in Washington. It was first reported by the Wall Street Journal on Friday 13 November 2026, and a person familiar with the matter confirmed the outcome to CNN the same day. The formal announcement is expected on Tuesday 17 November 2026.
US Measles Elimination Status — Quick Reference
| Status | Measles elimination status lost |
| Held since | 2000 — 26 years |
| Deciding body | PAHO Regional Verification Commission (panel of eight independent experts) |
| Reported | Friday 13 November 2026 (Wall Street Journal first) |
| Formal announcement expected | Tuesday 17 November 2026 |
| Confirmed cases in 2026 | 5,412 (CDC weekly update, 13 November 2026) |
| Cases in all of 2025 | 2,289 |
| Measles-associated deaths in 2026 | 10 reported by states (CDC published tally lists six) |
| Outbreaks in 2026 | 43, with 96% of cases linked to outbreaks |
| How to regain the status | 12 months without sustained domestic transmission |
A 26-Year Achievement Undone in a Single Outbreak Year
The United States was declared to have eliminated measles in 2000, when experts concluded that domestic transmission had been interrupted. Elimination never meant the virus had vanished entirely. Imported infections could still arrive from abroad, but they did not take hold and spread from person to person inside the country.
The Centers for Disease Control and Prevention (CDC) recorded 5,412 confirmed measles cases in 2026 in its weekly update on 13 November, up 230 in a single week and the 14th consecutive week of a triple-digit rise. The total is more than double the 2,289 cases recorded in all of 2025, and it makes 2026 the worst year for measles in the United States since 1991.
The CDC has identified 43 outbreaks in 2026, and 96% of infections are linked to them. Ten measles-associated deaths have been reported by the states this year, half of them in the past two weeks, making 2026 the deadliest measles year since 1991 as well. The CDC’s own published tally lists six deaths, a discrepancy that reflects how deaths are counted and reported rather than any dispute that people have died.
How the PAHO Panel Reached Its Verdict
The PAHO Regional Verification Commission spent the week reviewing epidemiological and laboratory evidence submitted by the CDC. Its test was precise: whether the same measles strain had circulated inside the United States without interruption for at least 12 consecutive months.
The panel presented its findings to PAHO after its annual meeting ended on Friday 13 November. The final decision rests with PAHO Director Jarbas Barbosa, who communicates each country’s status to the relevant authorities. Mexico and Bolivia are also under review in the same process, and the decision on the United States is expected to be made public on Tuesday 17 November.
Losing the status does not change the day-to-day work of fighting outbreaks. CDC Director Dr Erica Schwartz said this week that the agency would keep supporting state outbreak responses and promoting vaccination in exactly the same way. “Let’s say we did lose our measles elimination status. We’re going to be doing the same exact thing that we’ve been doing today, which is working with the states,” she told Reuters.
Falling Vaccination Rates Behind the Resurgence
The loss of elimination status is largely the result of years of falling childhood vaccination rates. Measles is one of the most contagious diseases known, and it spreads through the air when an infected person coughs or sneezes. Two doses of the MMR vaccine are about 97% effective at preventing measles, according to the CDC, but that protection only holds when enough children receive it.
When vaccination coverage slips below the level needed for community protection, imported cases find unvaccinated people to infect, and chains of transmission that once died out within weeks can now run for a year or more. That is what the PAHO panel found: a single viral lineage circulating continuously for more than 12 months.
The consequences reach beyond the case count. Health officials warn that a country that loses elimination status faces fresh questions about its vaccination programme, its surveillance systems and its ability to contain the next imported case. The status is not a trophy; it is a measure of whether the public health system can stop a highly contagious disease from taking root.
What Happens Next for Families and Health Services
For families, the practical advice has not changed. Children should receive two doses of the MMR vaccine on schedule, and adults who are unsure of their vaccination history should check with their doctor. Anyone with measles symptoms — fever, cough, runny nose, red eyes and a rash — should call ahead before visiting a clinic, so they are not seated in a waiting room with vulnerable people.
For the health system, the decision is a test of whether the United States can rebuild the coverage it has lost. The country can re-establish elimination status once it shows that outbreak transmission has been interrupted for at least 12 months. That clock can only start when the current chains of transmission are broken, which means finding and vaccinating the pockets of unvaccinated people where the virus is still circulating.
Frequently Asked Questions
Does losing elimination status mean measles is now endemic in the United States?
In practical terms, yes. The PAHO panel found that measles has spread continuously for more than 12 months, which is the definition of endemic transmission. The formal announcement is expected on Tuesday 17 November 2026.
How many measles cases has the US had in 2026?
The CDC’s weekly update on 13 November 2026 put the total at 5,412 confirmed cases, more than double the 2,289 recorded in all of 2025. It is the highest annual total since 1991.
Why did the United States lose the status?
Years of falling childhood vaccination rates allowed imported cases to spark outbreaks that kept spreading. When the same strain circulates without interruption for 12 months, elimination status is lost.
Does the decision change what the CDC does?
No. CDC Director Dr Erica Schwartz said the agency will continue supporting state outbreak responses and promoting vaccination in the same way, regardless of the status decision.
Can the United States regain elimination status?
Yes. The status can be re-established once the country demonstrates that outbreak transmission has been interrupted for at least 12 months.
