Prognosis
MRNA Vaccines Blocked Worst Outcomes as Variants Spread, CDC Says
- Protection from ventilator, death was 90% after multiple doses
- Data collected through multiple variant-fueled infection waves
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Messenger RNA vaccines were highly effective at preventing people from suffering the most severe outcomes from Covid-19 even as infectious new coronavirus variants spread, a U.S. study found.
Receiving two or three doses of a vaccine made by either Moderna Inc. or partners Pfizer Inc. and BioNTech SE led to a 90% reduction in the risk of needing to be put on a ventilator or death because of Covid-19, according to a study published by the Centers for Disease Control and Prevention on Friday.