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Story summary
- U.S. health officials report 4,410 measles cases and at least five deaths in 2026, the worst outbreak in 30 years.
- Kindergarten MMR vaccination fell to 92.4% in 2025-2026, below the 95% herd-immunity threshold.
- President Donald Trump signed an August order urging the MMR vaccine be split into individual shots, despite no evidence.
- The CDC stopped adding state-reported measles deaths to its national count, listing three deaths while Pennsylvania reported five.