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