Pfizer vaccine offers hope, but experts say challenges remain
Early data from Pfizer indicating its COVID-19 vaccine is 90-per-cent effective is giving millions of people hope. But some warn there are still many challenges ahead before a vaccine becomes available. To break down the issue, we're joined by Helen Branswell, an infectious disease and global health reporter; Rebecca McKillican, CEO at drug wholesaler McKesson Canada; and Dr. Caroline Quach, a pediatric infectious disease specialist and chair of the National Advisory Committee on Immunization.