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Which COVID-19 vaccine is best? Here's why that's really hard to answer

Retrieved on: 2021-06-21 00:33:45

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Which COVID-19 vaccine is best? Here's why that's really hard to answer. View article details on hiswai:

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And we know the efficacy of different COVID vaccines differ. For instance, we learned from clinical trials that the Pfizer vaccine reported an efficacy of ...

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