A TTC bus driver wearing a face mask is seen from side mirrors of a bus in Toronto, Canada, on Sept. 17, 2020. Starting on Thursday, face coverings or masks are mandatory in all shared TTC (Toronto Transit Commission) spaces, both indoors and outdoors. This also applies to operators when they are behind the protective barrier or in the cab. (Photo by Zou Zheng/Xinhua)

A TTC bus driver wearing a face mask is seen on a bus in Toronto, Canada, on Sept. 17, 2020. Starting on Thursday, face coverings or masks are mandatory in all shared TTC (Toronto Transit Commission) spaces, both indoors and outdoors. This also applies to operators when they are behind the protective barrier or in the cab. (Photo by Zou Zheng/Xinhua)