Pfizer, Moderna vaccines: Will they work? When is delivery? McGill scientist answers

Both the vaccines from Pfizer and Moderna are categorized as messenger RNA vaccines, and the technology behind this is relatively new, said Dr. Joe Schwarcz, director of the Office for Science and Society at McGill University. Schwarcz outlines the process by which Pfizer and Moderna conducted their vaccine trials, and explains why vaccines are very low-risk.