It's been used in desperate times of disease for a century—but there's never been a large-scale study of its effectiveness. It's relatively simple to administer, but requires a lot of resources to get right. Will it work? We don't know, but if it does it could be the armour the front-line workers need to battle COVID-19.

Today we look at a Canada-wide experimental treatment that could provide some important insights into how we beat this virus.

GUEST: Michael Doyle, journalist (Read Michael's piece in the Globe and Mail here.)

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