A nurse gives a mask to a citizen before the COVID-19 testing in Johannesburg, South Africa, April 8, 2020. The number of COVID-19 cases in South Africa has risen steadily over the past fews days amid massive community testing in a 21-day national lockdown. The country reported a total of 1,749 cases as of Tuesday, an increase of over 60 from Monday's announcement, Health Minister Zweli Mkhize said. (Photo by Shiraaz/Xinhua)

A nurse takes samples of a citizen for the COVID-19 testing in Johannesburg, South Africa, April 8, 2020. The number of COVID-19 cases in South Africa has risen steadily over the past fews days amid massive community testing in a 21-day national lockdown. The country reported a total of 1,749 cases as of Tuesday, an increase of over 60 from Monday's announcement, Health Minister Zweli Mkhize said. (Photo by Shiraaz/Xinhua)

A nurse disinfects the hands of a citizen before the COVID-19 testing in Johannesburg, South Africa, April 8, 2020. The number of COVID-19 cases in South Africa has risen steadily over the past fews days amid massive community testing in a 21-day national lockdown. The country reported a total of 1,749 cases as of Tuesday, an increase of over 60 from Monday's announcement, Health Minister Zweli Mkhize said. (Photo by Shiraaz/Xinhua)

A medic introduces the procedure of COVID-19 testing to citizens in Johannesburg, South Africa, April 8, 2020. The number of COVID-19 cases in South Africa has risen steadily over the past fews days amid massive community testing in a 21-day national lockdown. The country reported a total of 1,749 cases as of Tuesday, an increase of over 60 from Monday's announcement, Health Minister Zweli Mkhize said. (Photo by Shiraaz/Xinhua)