New York-based Pfizer originally planned for 30,000 participants, but in September expanded that to 44,000 people. That increase was made to boost diversity in the trial population, specifically by including 16- and 17-year-old teens, as well as stable patients with some common chronic infections: hepatitis B, hepatitis C and HIV.from Moneycontrol World News https://bit.ly/36WZCwo
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