A dancer works out with a face mask on as she observes social distancing during a ballet class in Johannesburg, South Africa, on July 17, 2020. South Africa recorded 324,221 confirmed cases and 4,669 deaths as of Thursday. (Photo by Yeshiel/Xinhua)

Dancers work out with face masks on as they observe social distancing during a ballet class in Johannesburg, South Africa, on July 17, 2020. South Africa recorded 324,221 confirmed cases and 4,669 deaths as of Thursday. (Photo by Yeshiel/Xinhua)

A dancer works out with a face mask on as she observes social distancing during a ballet class in Johannesburg, South Africa, on July 17, 2020. South Africa recorded 324,221 confirmed cases and 4,669 deaths as of Thursday. (Photo by Yeshiel/Xinhua)