Dr. Lipi Roy and Dr. Murtaza Akhter answer MSNBC viewer questions on the COVID-19 vaccine

NBC's Sam Brock joins Chris Jansing to share the latest reporting on the initial timeline for who will get a vaccine first when it becomes available. Dr. Lipi Roy, an internal medicine physician, and Dr. Murtaza Akhter, an assistant professor at the University of Arizona College of Medicine, also join Chris Jansing to answer MSNBC viewer questions about the coronavirus vaccine.