US virus numbers drop, but race against new strains heats up
In this Jan. 23, 2021, file photo, Dorothy Kade, left, holds the hand of her husband, Walter Kade Jr., as they wait in the observation room after he received a COVID-19 vaccine at the VA Medical Center, in Philadelphia.
Tyger Williams/The Philadelphia Inquirer via AP, File
Coronavirus deaths and cases per day in the U.S...
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