WASHINGTON – The U.S. stood on the verge of adding a second COVID-19 vaccine to its arsenal Friday as the outbreak descended deeper into its most lethal phase yet, with the nation regularly recording over 3,000 deaths per day.The Food and Drug Administration was evaluating a shot developed by Moderna Inc.
and the National Institutes of Health and was expected to give it the green light soon, clearing the way for its use to begin as early as Monday.That would give the U.S.
a critical new weapon against the coronavirus in addition to the Pfizer-BioNTech vaccine now being dispensed to millions of health care workers and nursing home patients as part of the biggest vaccination drive in U.S.