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Tourists wearing protective masks walk in front of Zappeion, in Athens, Sunday, March 15, 2020. Greek supermarkets will restrict the flow of customers entering the premises from Monday, in another attempt to prevent the spread of coronavirus. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Yorgos Karahalis)