Consistent with clinical trial data, a two-dose regimen prevented 90 percent of infections by two weeks after the second shot. One dose prevented 80 percent of infections by two weeks after vaccination. https://ift.tt/3fsPOhR https://ift.tt/31w9qtb World New York Times March 28, 2021 at 08:00PMThe Moderna and Pfizer-BioNTech vaccines are very effective in real-world conditions at preventing infections, the C.D.C. reported.

By Gina Kolata from NYT World https://ift.tt/3fsPOhR
https://ift.tt/3fsPOhR https://ift.tt/31w9qtb New York Times