Passengers wearing face masks get on and off a bus in Vancouver, British Columbia, Canada, Aug 4, 2020. The British Columbia Provincial health officer asked the public transit authorities to implement a mandatory mask policy like some other provinces in Canada instead of recommendation of mask wearing to help control the COVID-19 cases. (Photos: Xinhua)

A woman wearing a face mask is seen on a bus in Vancouver, British Columbia, Canada, Aug 4, 2020. The British Columbia Provincial health officer asked the public transit authorities to implement a mandatory mask policy like some other provinces in Canada instead of recommendation of mask wearing to help control the COVID-19 cases.

A passenger (C) is seen without a face mask on a bus in Vancouver, British Columbia, Canada, Aug 4, 2020. The British Columbia Provincial health officer asked the public transit authorities to implement a mandatory mask policy like some other provinces in Canada instead of recommendation of mask wearing to help control the COVID-19 cases.