1
Q:
| A) Germany | B) China |
| C) India | D) USA |
Answer: D) USA
Explanation:
Explanation:
The Pfizer Inc of the United States of America (USA) and its partner BioNTech of Germany completed the phase 3 trial of their COVID-19 vaccine candidate, BNT162b2 against SARS-CoV-2 with 95% effective success rate.
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