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Pfizer and Moderna vaccines prove effective, as COVID cases keep rising nationwide

Pfizer and its partner BioNTech announced plans to apply for FDA emergency use authorization for their vaccine candidate, after test results showed it was 95% effective at preventing COVID-19. CBS News' Danya Bacchus reports, and then New York Times' "Matter" columnist Carl Zimmer joins CBSN's "Red & Blue" anchor Elaine Quijano to discuss the impact of the coming vaccines.
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