After a year of ongoing measles outbreaks that have sickened more than 2,400 people, the United States is poised to lose its status as a measles-free country. However, the newly appointed principal deputy director at the Centers for Disease Control and Prevention, Ralph Abraham, said he was unbothered by the prospect at a briefing for journalists this week.
“It’s just the cost of doing business with our borders being somewhat porous for global and international travel,” Abraham said. “We have these communities that choose to be unvaccinated. That’s their personal freedom.”
Infections from other countries, however, accounted for only about 10% of measles cases detected since Jan. 20, 2025, the official start of the deadly measles outbreak in West Texas, which spread to other states and Mexico. The rest were acquired domestically. This marks a change since the U.S. eliminated measles in 2000. Measles occasionally popped up in the U.S. from people infected abroad, but the cases rarely sparked outbreaks, because of extremely high rates of vaccination. Two doses of the measles, mumps, and rubella vaccine strongly prevent infection and halt the virus’s spread.
To maintain its measles elimination status, the U.S. must prove that the virus has not circulated continuously in the nation for a year, between Jan. 20, 2025, and Jan. 20, 2026. To answer the question, scientists are examining whether the major outbreaks in South Carolina, Utah, Arizona, and Texas were linked.
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