Pfizer-BioNTech shot stops covid spread, Israeli study seems to show
Naomi Kresge and Jason Gale, Bloomberg
Feb. 22, 2021
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The Pfizer Inc. and BioNTech SE coronavirus vaccine appeared to stop the vast majority of recipients in Israel becoming infected, providing the first real-world indication that the immunization will curb transmission of the coronavirus.
The vaccine, which is being rolled out in a national immunization program that began Dec. 20, was 89.4% effective at preventing laboratory-confirmed infections, according to a copy of a draft publication that was posted on Twitter and confirmed by a person familiar with the work. The companies worked with Israel s Health Ministry on the preliminary observational analysis, which wasn t peer-reviewed. Some scientists disputed its accuracy.