U.S. Measles Elimination Status Under Review as Outbreaks Grow

Experts review the U.S. status

November 11, 2026, 11:48 p.m. Central time.

A panel of international health experts is reviewing whether the United States still meets the definition of having eliminated endemic measles, as outbreaks continue across the country. The U.S. has held that designation since 2000.

The Pan American Health Organization’s independent commission is meeting in Washington through November 13. Its recommendation goes to PAHO Director Jarbas Barbosa, who makes the final determination; the outcome is expected to be public early next week, Reuters reported. No decision had been announced as of Wednesday evening.

What elimination means

Elimination does not mean the country has zero measles cases. Infections can still be imported and trigger outbreaks. The question for reviewers is whether the same chain of transmission has continued inside a country for at least 12 months, based on epidemiological and laboratory evidence, Reuters reported.

PAHO said its commission reviews information submitted by countries across the Americas on measles and rubella. Canada lost its measles elimination status in 2025, according to Reuters.

Why the review matters

The CDC reported 5,182 confirmed U.S. measles cases in 2026 as of November 5. That is a surveillance cutoff, not a count of infections through the day this article was published.

The designation will not by itself stop outbreaks. Measles spreads through the air and can cause severe complications; the CDC says vaccination helped the U.S. achieve elimination in 2000. People with questions about protection can consult their health care provider or local health department.

Timeline

2000: The U.S. was declared to have eliminated endemic measles. November 5, 2026: CDC case-count cutoff. November 10–13: PAHO’s expert commission meets in Washington.

Where the review is taking place

The star marks the approximate Washington, D.C., area, not a meeting location.

Map data: © OpenStreetMap contributors, ODbL.

Sources and visual credits

Reuters: review underway · CDC: measles cases and outbreaks · PAHO: annual commission meeting · Newstro: latest CDC case count

Hero and thumbnail: conceptual editorial illustration, not a photograph.