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EXPLAINER: What is vaccine efficacy and what does it mean?

As Covaxin shows vaccine efficacy of 81 percent, a look at what efficacy means, how it is calculated, the difference between efficacy and efficiency, and more

By Forbes India

Published: Mar 4, 2021 07:25:46 PM IST

Updated: Mar 4, 2021 07:35:43 PM IST

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