Double masks, vaccines and variants: your COVID cheat sheet

As lockdown orders have eased, many elements are still at play in the fight against COVID-19. Dr. Colin Furness, epidemiologist at the Dalla Lana School of Public Health at the University of Toronto, joins "This Matters" host Adrian Cheung to sort through the science of face masks, the vaccination program, debates around reopening and a possible third wave down the road. If you would like to support the journalism of the Toronto Star, you can subscribe at thestar.com/subscribingmatters