COVID-19: What Pfizer’s vaccine trial means for the pandemic

Infectious disease doctors answer questions about the COVID-19 pandemic and what the announcement by Pfizer about its early results from its vaccine means. Watch The National live on YouTube Sunday-Friday at 9 p.m. ET Subscribe to The National: https://www.youtube.com/user/CBCTheNa... Connect with The National online: Facebook |   / thenational   Twitter |   / cbcthenational   Instagram |   / cbcthenational   More from CBC News | https://www.cbc.ca/news The National is CBC's flagship nightly news program, featuring the day's top stories with in-depth and original journalism, with hosts Adrienne Arsenault and Andrew Chang in Toronto, Ian Hanomansing in Vancouver and the CBC's chief political correspondent, Rosemary Barton in Ottawa.