People buy meat products at a supermarket in Johannesburg, South Africa, March 16, 2020. South Africa on Wednesday reported 31 new cases of COVID-19, bringing the tally to 116, as local transmissions increased. (Xinhua/Chen Cheng)

Few products are left on the shelves of a supermarket in Johannesburg, South Africa, March 17, 2020. South Africa on Wednesday reported 31 new cases of COVID-19, bringing the tally to 116, as local transmissions increased. (Xinhua/Chen Cheng)

Few products are left on the shelves of a supermarket in Johannesburg, South Africa, March 17, 2020. South Africa on Wednesday reported 31 new cases of COVID-19, bringing the tally to 116, as local transmissions increased. (Xinhua/Chen Cheng)

A notice of limiting sales is seen at a supermarket in Johannesburg, South Africa, March 17, 2020. South Africa on Wednesday reported 31 new cases of COVID-19, bringing the tally to 116, as local transmissions increased. (Xinhua/Chen Cheng)