AstraZeneca is racing to adapt its Covid-19 vaccine in the face of new variants of the virus. The process has become more urgent after a study found that it was less effective at protecting against the more virulent strain discovered in South Africa. https://t.co/y3hx7ZkhH7 pic.twitter.com/kIjlyzeV4T
— CNBC (@CNBC) February 11, 2021
Source: Twitter
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