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As U.K. starts rolling out COVID vaccine, doctor says U.S. faces challenges

British health authorities have begun rolling out initial doses of the coronavirus vaccine created by Pfizer and BioNTech. In the U.S., Pfizer's vaccine could be approved by the end of the week. CBS News foreign correspondent Charlie D'Agata reports from outside the hospital in central England where the first dose was administered, and Dr. Dyan Hes, founder of Gramercy Pediatrics in New York City, joined CBSN to discuss what precautions Americans should be taken as they await the vaccine in the U.S.
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