Pfizer-BioNTech vaccine stops Covid-19 spread by 90%, says study

This provides the first indication that the immunisation will curb transmission

The Pfizer and BioNTech SE Covid-19 vaccine appeared to stop the vast majority of recipients in Israel becoming infected, providing the first real-world indication that the immunisation will curb transmission of the coronavirus.
 
The vaccine, which was rolled out in a national immunisation program that began December 20, was 89.4 per cent 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 The companies and Israel’s Health Ministry worked together on the preliminary observational analysis, which has not yet been peer-reviewed.