1 year, 1 month ago

Does frequently updating COVID-19 vaccines have any benefits? | Explained

Researchers update the composition of influenza vaccines every six months to match the strains of the virus that are circulating in the wild, so that the shots may provide protective immunity against the flu. The VE of COVID-19 vaccines varies according to the disease’s progression as well as the circulating strains. Thus, researchers worldwide rushed to revise COVID-19 vaccines that contained the ancestral strain to match the circulating strain of SARS-CoV-2 and keep it clinically relevant. There were three COVID-19 vaccines available as booster doses at this time: the monovalent ancestral shot, a bivalent OG+BA.1 shot, and a bivalent OG+BA.5 booster.

The Hindu

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