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Pfizer, BioNTech propose expanding COVID-19 vaccine trial to 44,000 volunteers

Updated : September 13, 2020 10:26 AM IST

Pfizer Inc and BioNTech SE on Saturday proposed to the U.S Food and Drug Administration (FDA) to expand their Phase 3 pivotal COVID-19 vaccine trial to about 44,000 participants .
Drugmakers racing to develop a safe and effective coronavirus vaccine pledged in July to ensure their larger clinical trials.
Pfizer, BioNTech propose expanding COVID-19 vaccine trial to 44,000 volunteers

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