Check out the full interview with Mona Nemer, Canada's chief science advisor. Nemer says researchers will likely know by the end of this year whether they have developed a usable vaccine. If they have, she said, it could be available to Canadians by early 2021.  Nemer gave a wide-ranging interview on this week’s edition “The West Block” about the status of the pandemic globally and Canada’s efforts to slow the spread of the virus.

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