Toronto Star:

https://www.thestar.com/news/canada/2020/04/06/latest-covid-19-news-in-canada-emergency-aid-applications-open-today-e-learning-starts-for-ontario-students.html?source=newsletter&utm_source=ts_nl&utm_medium=email&utm_email=25045E6DEEE6E013E6428966955E2F07&utm_campaign=bn_23337

Non-medical masks can keep people with COVID-19 from spreading it, Canada’s public health office says

MONDAY, APRIL 06, 2020. 12:59 PM EDT

Canada’s top public-health doctor says wearing masks is a way for people who might have COVID-19 without realizing it to keep from spreading the illness to others.
That’s a change from previous advice.