STAT News: Covid-19 vaccine from Pfizer and BioNTech is strongly effective, early data from large trial indicate

STAT News: Covid-19 vaccine from Pfizer and BioNTech is strongly effective, early data from large trial indicate. “The vaccine is the first to be tested in the United States to generate late-stage data. The companies said an early analysis of the results showed that individuals who received two injections of the vaccine three weeks apart experienced more than 90% fewer cases of symptomatic Covid-19 than those who received a placebo. For months, researchers have cautioned that a vaccine that might only be 60% or 70% effective.”

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