Two Doctors from Earth: Which COVID-19 vaccine is safe and effective?
Two Doctors from Earth: Which COVID-19 vaccine is safe and effective?
Currently, AstraZeneca Covid-19 vaccine has attracted the most attention globally, and as a result, the effectiveness of other Covid-19 vaccines is thrust into the limelight. It is known that China and U.S.A have approved 7 Covid-19 vaccines for emergency use. What are the differences between them? And which one is the most effective?
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关键词:
AstraZeneca,vaccine,China,USA,COVID-19,Pfizer-BioNTech
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