Researchers are working around the clock to answer crucial questions about COVID-19, like how the virus spread across Canada and whether those who have had it are now immune. Tina Yazdani with the latest findings. 1130covid19canadacftryoutubecitynewsyoutubeCoronaviruscoronavirus immunitycovidCOVID-19COVID19immune systemIMMUNITYlatestregion=calgaryregion=edmontoncitynewsregion=montrealcitynewsregion=nationalregion=torontoregion=toronto680newsregion=torontocitynewsregion=vancouverregion=winnipegcitynewsresearchRevealssection=localsection=nationalsection=newsshow=citynewsshow=covid19newsspreadsrc=citynewsvideoVIRUSVITAMINvlogYouTube
