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Story summary
- President Donald Trump signed an August 10, 2026 order to split the MMR vaccine into three shots.
- The United States logged 2,566 measles cases and 38 outbreaks by August 13, 2026, according to CDC data.
- About 93% of this year’s cases involved unvaccinated or unknown-status individuals.
- Officials will review the U.S. measles elimination status in November 2026 amid risk of loss.
