For months, the three COVID-19 vaccines used in the United States — Pfizer-BioNTech, Moderna, and Johnson & Johnson — were being administered under emergency use authorization by the FDA. Monday, the Pfizer-BioNTech dose was given full FDA approval. Dr. Asha Shah, the director of infectious diseases at Stamford Health, joined Cheddar to discuss what the full approval from the FDA means and if it could bring a potential sea change in vaccine hesitancy.