
Workers make preparation for a face mask exhibition at the National Museum amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 21, 2020. (Photo/Agencies)

Workers make preparation for a face mask exhibition at the National Museum amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 21, 2020. (Photo/Agencies)

Face masks are displayed on a shelf before an exhibition at the National Museum amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 21, 2020. The sign reads: "We stick together". REUTERS/David W Cerny

A workers makes preparation for a face mask exhibition at the National Museum amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 21, 2020. (Photo/Agencies)