Cases of norovirus are increasing in Canada after a pandemic lull. If you haven't had it before, it's a highly-contagious virus that causes several unpleasant symptoms. Angela Rasmussen, a virologist at the University of Saskatchewan's Vaccine and Infectious Disease Organization, shares what we know about the virus and how best to avoid it. For transcripts of this series, please visit: https://www.cbc.ca/radio/podcastnews/the-dose-transcripts-listen-1.6732281