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Pfizer-BioNTech booster shot was 95.6% effective in large trial, companies say

The additional dose was safe and tolerable, and consistent with what was known about the vaccine, Pfizer-BioNTech said (Photo: Reuters) Premium
The additional dose was safe and tolerable, and consistent with what was known about the vaccine, Pfizer-BioNTech said (Photo: Reuters)

Why Covaxin is yet to win WHO's emergency approval

2 min read . Updated: 20 Oct 2021
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