Scientist Xinhua Yan works in the lab at Moderna in Cambridge, MA on Feb. 28, 2020. Moderna has developed the first experimental coronavirus medicine, but an approved treatment is more than a year away.
David L. Ryan | Boston Globe | Getty Images
The first human trial testing a potential vaccine to prevent COVID-19 began Monday, U.S. health officials confirmed.
Finding “a safe and…
By usnewsr1-
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