Covid Vaccines Are Less Effective Against Delta, Large Study Finds Naomi Kresge Bookmark August 19 2021, 4:31 AM
Authors: Naomi Kresge Copyright © BloombergQuintCopyright © Covid-19 vaccines are less effective against the delta variant, according to results in the U.K. from one of the largest real-world studies into the efficacy of the shots. Pfizer Inc. and BioNTech SE’s messenger RNA vaccine lost effectiveness in the first 90 days after full vaccination, though that […]