FILE PHOTO: A sign is pictured outside Pfizer Headquarters in the Manhattan borough of New York City, New York, U.S., July 22, 2020. REUTERS/Carlo Allegri/File Photo
(Reuters) - 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 while increasing the diversity of the trial population.
The initial target figure for the trial was up to 30,000 participants, which the companies said they expect to reach by next week.
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