Elimination

• The CDC posted its first large set of genetic data from 1,000 measles viruses circulating in the US last year, with more data expected soon to assess if elimination status has been lost. • In 2025, measles cases reached 2,285 across 44 states—the worst in over 30 years—while 2026 has seen 1,575 cases by late March amid declining vaccination rates. • Delays in data release stemmed from mass layoffs and resignations; researchers criticize the Trump administration's budget cuts and slow outbreak response.

• As of March 6, 2026, the United States has confirmed 1,300 measles infections this year across 30 states, putting the country on track to surpass 2025's record 35-year high numbers. • Measles has continuously circulated in the U.S. for over a year following an outbreak in Texas (January-August 2025), with ongoing outbreaks on the Utah-Arizona border and in South Carolina that drastically increased in January 2026. • The Pan American Health Organization postponed its decision from April to November 2026 on whether the U.S. should lose its measles elimination status achieved in 2000, but current trends suggest it likely will due to vaccination rates falling below the critical 95% threshold.