Health experts urge caution as COVID infections and hospitalizations decline in U.S.

The fight against the coronavirus is gaining momentum in the U.S. as hospitalizations and infections continue to fall. As CBS News' Meg Oliver reports, health experts warn the U.S. not out of the woods yet as variants emerge and the Super Bowl threatens to be the next super-spreader event. Dr. Dara Kass, an ER doctor and medical contributor for Yahoo News, joins CBSN's Elaine Quijano with the latest developments on the pandemic.