The link below is from a live Zoom webinar that aired on December 7, 2020. The portion of the video between 11:35 - 21:18 is a presentation on the development of the versions of the COVID-19 vaccine specific to each manufacturer. The portion between 11:35 - 21:18 is presented by Dr. Kenneth A. Scheppke, the EMS Medical Director for the state of Florida. We found the presentation very informative on the development, safety, and efficacy of the vaccines.
HHS/ASPR Project ECHO COVID-19 Vaccine Video