An electronic screen displays epidemic prevention advices in Addis Ababa, Ethiopia, Sept. 1, 2020. (Photo by Michael Tewelde/Xinhua)

A vender wearing a face mask sells hot drinks in Addis Ababa, Ethiopia, Sept. 1, 2020. (Photo by Michael Tewelde/Xinhua)

People wearing face masks walk along a street in Addis Ababa, Ethiopia, Sept. 1, 2020. (Photo by Michael Tewelde/Xinhua)