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What full FDA approval of the Pfizer vaccine means

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This week, the FDA granted full approval to the Pfizer vaccine. Will that make a difference for vaccine-hesitant Americans? Dr. Irwin Redlener, founding director of the National Center for Disaster Preparedness at Columbia University and a MSNBC Public Health Analyst, joined NBC’s Joshua Johnson to discuss the process behind full FDA approval and its possible impact on vaccination rates.