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FDA and CDC advisory panel approve third coronavirus vaccine for Americans

Which vaccine is the most effective against the coronavirus? The Moderna and Pfizer vaccines require two shots to be fully vaccinated. However, the new Johnson and Johnson vaccine uses a one-shot method and is easier to store. CBS News researcher Max Bayer joins CBSN's Land Zak to discuss the difference between the vaccines, their efficacy against variants, and if pregnant women should be vaccinated.
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