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'More than just a blip': Canada's COVID-19 cases on the rise

As school returns and temperatures drop, coronavirus cases are ticking back up in Canada. Dr. Isaac Bogoch explains what the numbers mean, and how they can be brought back down.
The drive-thru COVID-19 test site in Casselman, Ont., east of Ottawa, on Sept. 15, 2020. (Frédéric Pepin/Radio-Canada)

Coronavirus cases are on the upswing in Canada's four most populous provinces: Ontario, Quebec, Alberta and British Columbia. On Tuesday, Ontario reported 251 new confirmed cases: the fifth day in a row of more than 200 new infections. To put that in perspective, the last time that happened was in early June, when the province's restaurants, hair salons and places of worship were still locked down. 

Today, infectious disease specialist Dr. Isaac Bogoch on what these numbers mean, and what can be done to tamp them back down.