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AstraZeneca, Sputnik vaccines face hurdles if Covid shots become annual affair

So-called viral vector shots - also used by several Chinese Covid-19 vaccine developers - use harmless modified viruses as vehicles, or vectors, to carry genetic information that helps the body build immunity against future infections.AstraZeneca, Sputnik vaccines face hurdles if Covid shots become annual affair
A healthcare worker administers a dose of the Sputnik V coronavirus disease (Covid-19) vaccine to her colleague in Podgorica, Montenegro, February 22, 2021. Reuters
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Reuters
Published at : February 26, 2021
Updated at : February 26, 2021 15:13
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