US measles elimination status ends after 26 years as continuous transmission is found

Documented: The United States held measles elimination status from 2000, meaning endemic transmission had been interrupted. On Nov. 13–14, 2026, the Wall Street Journal, Reuters, KFF Health News, and the Washington Post reported that an independent regional verification commission reporting to the Pan American Health Organization concluded the country no longer meets that standard, after the same chains of transmission continued for more than 12 months. A public PAHO announcement was expected the following week; as of those reports, PAHO had not yet posted a formal classification document. A source familiar with CDC findings told Reuters the agency itself found 12 months of continuous transmission. Elimination status is a surveillance classification, not a claim that measles had vanished; imported cases and short outbreaks can occur without losing it.

Documented case burden: CDC data cited by Reuters, CIDRAP, and MedPage Today put confirmed US measles cases at 5,412 as of Nov. 12, 2026, across dozens of jurisdictions—more than double the 2,289 confirmed for all of 2025 and the highest annual total since 1991 (9,643). About 96 percent of 2026 cases were outbreak-associated, and a substantial share were linked to chains that began in 2025. Roughly 96 percent of cases were in people who were unvaccinated or whose vaccination status was unknown. Hospitalizations numbered in the hundreds this year; KFF Health News, citing Johns Hopkins researchers, estimated more than 8,000 people sickened and more than 830 hospitalized over two years, with response costs on the order of $125 million.

Documented deaths, with a counting dispute: Reuters reported that the CDC had confirmed six measles-related deaths in 2026, double its 2025 count, after switching to National Center for Health Statistics mortality data. State health departments have reported a higher toll. MedPage Today and the Washington Post described about 10 state-reported measles-associated deaths in 2026, including Pennsylvania’s seventh (an unvaccinated resident), a second pediatric death in Wisconsin, and New York’s first in more than 30 years. Since 2025, Reuters has cited roughly 7,500 US infections and 13 deaths. Claimed, not independently resolved here: Health Secretary Robert F. Kennedy Jr. has disputed some Pennsylvania death attributions; Pennsylvania has said those people tested positive for measles and were unvaccinated. The gap between CDC and state counts is documented; which figure is the more complete clinical tally is not settled in the public record available at the time of these reports.

Documented immunity gap: CDC SchoolVaxView data for the 2025–2026 school year show national kindergarten MMR coverage at 92.4 percent, down from 95.2 percent in 2019–2020, with exemptions from one or more vaccines at a record 4.2 percent (about 155,000 kindergartners) and about 280,000 kindergartners without documented completion of the MMR series. Coverage below about 95 percent is the threshold public-health agencies treat as the floor for interrupting measles transmission. The national average also conceals lower coverage in some states and communities, which is where sustained outbreaks concentrate. CDC Director Erica Schwartz told Reuters that losing the designation would not change the operational response and that vaccination, not the label, protects people. HHS has said Kennedy and the CDC director continue to recommend MMR.

Regional context, documented: PAHO announced on Nov. 10, 2025, that the Americas had already lost regional verification as free of endemic measles after the virus circulated in Canada for at least 12 months. Other countries, including the UK and Spain, have also lost elimination status in recent WHO-linked reviews. Regaining US status requires at least 12 months without continuous transmission of any strain.

What is not established: The classification does not, by itself, prove a single political cause. Falling coverage and rising nonmedical exemptions predate the current administration and accelerated after 2019. What is measurable is the result: a virus that two doses of MMR prevent in about 97 percent of recipients is again circulating for more than a year inside the country, hospitalizing people and killing some, almost all of them unvaccinated, including infants too young for the first dose.