The Canadian National Tower (CN Tower) is lit up with a heart shape to honour front line workers fighting against COVID-19 during the 2020 World Health Day in Toronto, Canada, April 7, 2020. (Photo by Zou Zheng/Xinhua)

Lights in the Toronto Hilton Hotel are lit up in the shape of a heart to honor front line workers fighting against COVID-19 during the 2020 World Health Day in Toronto, Canada, April 7, 2020. (Photo by Zou Zheng/Xinhua)

A giant screen outside the Scotiabank Arena is lit blue with words of thanks to honour front line workers fighting against COVID-19 during the 2020 World Health Day in Toronto, Canada, April 7, 2020. (Photo by Zou Zheng/Xinhua)

Lights in the Toronto Hilton Hotel are lit up in the shape of a heart to honour front line workers fighting against COVID-19 during the 2020 World Health Day in Toronto, Canada, April 7, 2020. (Photo by Zou Zheng/Xinhua)

Lights in the Fairmont Royal York Hotel are lit up in the shape of a heart to honour front line workers fighting against COVID-19 during the 2020 World Health Day in Toronto, Canada, April 7, 2020. (Photo by Zou Zheng/Xinhua)