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A shopping guide wearing a face mask is seen at a shopping mall in Johannesburg, South Africa, March 22, 2020. South Africa on Sunday reported 34 new COVID-19 cases, bringing the country's total to 274. (Xinhua/Chen Cheng)

A shopping guide wearing a face mask is seen at a shopping mall in Johannesburg, South Africa, March 22, 2020. South Africa on Sunday reported 34 new COVID-19 cases, bringing the country's total to 274. (Xinhua/Chen Cheng)