COVID-19 vaccines

COVID-19 vaccines

By Gino Bottino, MD

As of January 2021, 69 COVID-19 vaccine candidates were in clinical research using multiple technologies. Several COVID-19 vaccines demonstrated efficacy as high as 95% in preventing symptomatic COVID-19 infections.

At that time, 10 vaccines had been authorized by at least one national regulatory authority for public use: two RNA vaccines (the Pfizer and Moderna vaccines), four conventional inactivated vaccines (Sinopharm, Covaxin from Bharat Biotech, Sinovac, and Sinopharm), three viral vector vaccines (Sputnik V from the Gamaleya Research Institute, AstraZeneca, and CanSino), and one peptide vaccine (EpiVacCorona).

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