Canadians should wear masks now, says top doctor

Dr. Theresa Tam is now recommending that Canadians wear masks as an “added layer of protection” against COVID-19. So, why has the guidance changed, and should it have come earlier? Power & Politics speaks to Economic Development Minister Mélanie Joly, Dr. Catherine Hankins, co-chair of the federal COVID-19 Immunity Task Force, and Ontario mayors Bonnie Crombie and Patrick Brown.