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Pfizer says 3rd shot of COVID vaccine more effective at neutralizing Omicron variant

Pfizer and BioNTech say research shows three doses of their COVID-19 vaccine is more effective at neutralizing the new Omicron variant than just two doses. The companies also revealed plans to develop a variant-specific shot by March. Urgent care nurse practitioner Justin Gill joins CBSN to discuss the latest coronavirus headlines.
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