ZURICH: Vaccines from AstraZeneca, Russia's Gamaleya Institute and Johnson & Johnson fight the coronavirus with another virus, leaving scientists concerned the shots may lose potency if annual inoculations become necessary to fight new variants. So-called viral…
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Source:https://www.channelnewsasia.com/news/world/covid-19-vaccine-viral-vector-immunity-astrazeneca-sputnik-14288456
Published on: Fri, 26 Feb 2021 16:43:39 +0800
