Photo taken on April 1, 2020 shows marks on the ground reminding people of social distancing at a supermarket in Canberra, Australia. (Photos: Xinhua)

Photo taken on April 1, 2020 shows marks on the ground reminding people of social distancing at a supermarket in Canberra, Australia.

Photo taken on April 1, 2020 shows marks on the ground reminding people of social distancing at a supermarket in Canberra, Australia.

Photo taken on April 1, 2020 shows marks on the ground reminding people of social distancing at a supermarket in Canberra, Australia.

A member of staff puts a mark on the floor that reminds people of social distancing at a supermarket in Canberra, Australia, April 1, 2020.