STAT News reports:
Pfizer and partner BioNTech said Monday that their vaccine against Covid-19 was strongly effective, exceeding expectations with results that are likely to be met with cautious excitement — and relief — in the face of the global pandemic. 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.
The Phase 3 study is ongoing and additional data could affect results. There is no information yet on whether the vaccine prevents severe cases, the type that can cause hospitalization and death.
Breaking News: Pfizer said early data showed its vaccine was more than 90 percent effective in preventing Covid-19, pushing the company to a lead in the vaccine race. https://t.co/HThqNKKPps
— The New York Times (@nytimes) November 9, 2020