Tag: vaccine effectiveness

The rise and rapid decline of 3 COVID vaccines’ effectiveness against severe disease and deaths

Posted on by Jesse Santiano, M.D.

The Lancet posted a retrospective study about the waning effectiveness of several COVID-19 vaccines among Sweden’s population. The study group involved 842,974 matched pairs of vaccinated and unvaccinated individuals. The individuals were immunized with two doses of AstraZeneca (ChAdOx1 nCoV-19), Moderna (mRNA-1273), or Pfizer (BNT162b2). Two critical endpoints were measured: symptomatic infections and severe Covid-19…

The Absolute Risk Reduction of the Pfizer Biontech Booster Shot

Posted on by Jesse Santiano, M.D.

Pfizer Biontech announced that their COVID-19 Vaccine Booster Dose showed a high efficacy rate based on their Phase 3 Trial Data. [1] The Pfizer Biontech is incomplete because they only stated the Relative Risk. It should also show the Absolute Risk Reduction that applies to an individual. This article shows that only one person will…