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Top Pfizer scientist on COVID-19 vaccine

Pfizer announced it will supply 200 million doses of its COVID-19 vaccine for the U.S. by the end of May and is aiming to ship 2 billion doses globally this year. The vaccine is over 90% effective according to clinical trials conducted in 2020, but more testing needs to be done to see how well it protects against the new variants. Dr. Phil Dormitzer, who helped develop the vaccine as vice president and chief scientific officer of viral vaccines at Pfizer, joins CBSN to discuss.

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COVID cases 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.

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