Mass distribution of Moderna's coronavirus vaccine begins in the U.S.
Moderna began shipping out 6 million doses of its coronavirus vaccine Monday across thousands of sites in the U.S. It comes days after a new strain of the virus was discovered in the U.K. CBS News correspondents Imtiaz Tyab and Mola Lenghi recap the day's news, then Dr. Dara Kass, an ER doctor and medical contributor for Yahoo News, joins CBSN's Tom Hanson with more.