Critical care doctor calls COVID vaccine 'a dream come true'

Dr. Hugh Cassiere, the director of critical care services at Northwell Health’s North Shore University Hospital in Manhasset, N.Y., is one of many health care workers who received the first dose of the Pfizer-BioNTech COVID-19 vaccine this week. He talked to Yahoo News about what this moment meant to him, and why people should not fear the vaccine.