Nov 10, 2020
Covid-19 vaccine from Pfizer and BioNTech
 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 สล็à¸à¸• of symptomatic Covid-19 than those who received a placebo. Formonths, 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.
