Efficacy of Pfizer/BioNTech Covid vaccine slips to 84% after six months, data show.

Efficacy of Pfizer/BioNTech Covid vaccine slips to 84% after six months, data show – STAT

Original study (preprint): Six Month Safety and Efficacy of the BNT162b2 mRNA COVID-19 Vaccine – medRxiv

Commentary on Twitter (thread – click for more)

6-month followup for major BNT-Pfizer vax trial. While still blinded, overall vaccine efficacy was:

– against symptomatic Covid-19: 91.1% (89-93)
– against severe Covid-19: 96.7% VE (80-99.9)

…1/nhttps://t.co/B6JVxJeS2C (preprint) pic.twitter.com/KlwwjoqrfZ

— Hilda Bastian, PhD (@hildabast) July 28, 2021