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The delta variant is much more contagious, more likely to break through protections afforded by the vaccines and may cause more severe disease than all other known versions of the virus, according to an internal presentation circulated within the Centers for Disease Control and Prevention. Dr. Rochelle Walensky, the director of the agency, acknowledged Tuesday that vaccinated people with so-called breakthrough infections of the delta variant carry just as much virus in their nose and throat as unvaccinated people, and may spread it just as readily, if less often. But the internal document lays out a broader and grimmer view of the variant.

New yorkUnited statesUnited kingdomBellevue hospital centerJohn mooreRochelle walenskyCenters for diseaseNew york timesDisease controlWashington postCeline gounderWeill cornell medicineபுதியது யார்க்ஒன்றுபட்டது மாநிலங்களில்ஒன்றுபட்டது கிஂக்டம்பெல்வ்யூ மருத்துவமனை மையம்