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What to know about US measles cases on the rise
- Two Pennsylvania residents have died — the first U.S. measles deaths in 2026 and the first in the state in 35 years.
- Measles is surging after childhood vaccination rates fell; the U.S. had 2,777 confirmed cases as of Aug. 20 and outbreaks are tied to lower kindergarten coverage.
- The best protection is two MMR doses (about 97% effective); measles is highly contagious (up to 90% of nearby unvaccinated people can get infected), so vaccination or boosters are recommended.
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