A roller-skater passes a mural which thanks frontline workers outside a boarded-up store amid the COVID-19 outbreak in Toronto, Canada, on May 13, 2020. (Photo by Zou Zheng/Xinhua)

A man walks past a mural outside a boarded-up store amid the COVID-19 outbreak in Toronto, Canada, on May 13, 2020. (Photo by Zou Zheng/Xinhua)

A man wearing a face mask looks at a mural which thanks frontline workers outside a boarded-up store amid the COVID-19 outbreak in Toronto, Canada, on May 13, 2020. (Photo by Zou Zheng/Xinhua)

A mural which thanks frontline workers is seen outside a boarded-up store amid the COVID-19 outbreak in Toronto, Canada, on May 13, 2020. (Photo by Zou Zheng/Xinhua)

People walk past a mural which thanks frontline workers outside a boarded-up store amid the COVID-19 outbreak in Toronto, Canada, on May 13, 2020. (Photo by Zou Zheng/Xinhua)