Dr. Celine Gounder on FDA Moderna review, Pfizer vaccine side effects

Operation Warp Speed aims to hit a 20 million vaccine dose goal by the end of 2020. Dr. Celine Gounder, a member of President-elect Biden's Covid-19 Advisory Board, addresses supply chain issues as well as several reports of allergic reactions caused by the Pfizer-BioNTech vaccine.Dec. 17, 2020