Medical staff members inquire about a patient at a quarantine and isolation center in Johannesburg, South Africa, July 3, 2020. South Africa has recorded a total of 168,061 confirmed cases of COVID-19 and 2,844 deaths as of Thursday, according to Health Minister Zweli Mkhize. (Photo by Yeshiel/Xinhua)

A man walks through a disinfection passage of a quarantine and isolation center in Johannesburg, South Africa, July 3, 2020. South Africa has recorded a total of 168,061 confirmed cases of COVID-19 and 2,844 deaths as of Thursday, according to Health Minister Zweli Mkhize. (Photo by Yeshiel/Xinhua)

A medical staff member wearing protective suit is seen at a quarantine and isolation center in Johannesburg, South Africa, July 3, 2020. South Africa has recorded a total of 168,061 confirmed cases of COVID-19 and 2,844 deaths as of Thursday, according to Health Minister Zweli Mkhize. (Photo by Yeshiel/Xinhua)

Medical staff members wearing protective suits are seen at a quarantine and isolation center in Johannesburg, South Africa, July 3, 2020. South Africa has recorded a total of 168,061 confirmed cases of COVID-19 and 2,844 deaths as of Thursday, according to Health Minister Zweli Mkhize. (Photo by Yeshiel/Xinhua)

A medical staff member wearing protective suit is seen at a quarantine and isolation center in Johannesburg, South Africa, July 3, 2020. South Africa has recorded a total of 168,061 confirmed cases of COVID-19 and 2,844 deaths as of Thursday, according to Health Minister Zweli Mkhize. (Photo by Yeshiel/Xinhua)