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In July 2020, the vaccine development program Operation Warp Speed placed an advance order of US$1.95 billion with Pfizer to manufacture 100 million doses of a COVID‑19 vaccine for use in the United States if the vaccine was shown to be safe and effective.
[23] [24] In the United Kingdom, 138,000 people had received the Pfizer-BioNTech COVID‑19 vaccine Comirnaty by 16 December, during the first week of the UK vaccination programme. [116] On 18 December 2020, the US FDA granted an EUA for mRNA-1273, the Moderna vaccine. [26] [27] [28] Vaccine manufacturers are awaiting full approvals to name ...
On July 22, 2020, the U.S. government placed a conditional advance-purchase order of $2 billion with Pfizer to manufacture 100 million doses of a COVID-19 vaccine, with an option for 500 million more, for use in the United States if the vaccine was shown to be safe, effective, licensed, and authorized by the Food and Drug Administration (FDA).
Pfizer and Moderna vaccines are both safe and have similar effectiveness at preventing COVID-19 illness. Clinical trial data when they were first released in December 2020 showed 95% efficacy for ...
A single shot of the Pfizer vaccine cuts the chance of hospital admission and death from Covid-19 by more than 75% among the over-80s, according to real-world data from Public Health England (PHE).
The COVID-19 vaccine developed by Pfizer and its German partner BioNTech remains 91% effective at protecting against coronavirus for at least six months after the second dose.
[353] [354] [355] Aiming for a realistic population vaccination coverage rate of 75%, and depending on the actual basic reproduction number, the necessary effectiveness of a COVID-19 vaccine is expected to need to be at least 70% to prevent an epidemic and at least 80% to extinguish it without further measures, such as social distancing. [356]
Pfizer’s coronavirus vaccine is 90% effective at preventing hospitalizations for up to six months even as its effectiveness against infections tumbles over time, a new observational study has found.
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