Moderna

AP Photo/Hans Pennink, File

Updated 12/18/20, 2:50 p.m.

WASHINGTON — The U.S. added a second COVID-19 vaccine to its arsenal Friday, boosting efforts to beat back an outbreak so dire that the nation is regularly recording more than 3,000 deaths a day.

AP Photo/Bill Sikes, file

Updated 12/17/20, 12:15 p.m.

WASHINGTON — A government advisory panel endorsed a second COVID-19 vaccine Thursday, paving the way for the shot to be added to the U.S. vaccination campaign.

AP Photo/Ted S. Warren, File

Updated 11/16/20, 11:48 a.m.

A second experimental COVID-19 vaccine — this one from Moderna Inc. — yielded extraordinarily strong early results Monday, another badly needed dose of hope as the pandemic enters a terrible new phase.