A man wearing an old military gas mask rides the subway in Prague, Czech Republic, Tuesday, March 17, 2020. Due to the outbreak of the novel coronavirus called COVID-19 the Czech capital banned all passengers from the public transport who would not have any face protection. The order by Prague's mayor Zdenek Hrib says the protection might include face masks, respirators or scarves will also do. For most people, the new coronavirus causes only mild or moderate symptoms. For some it can cause more severe illness. (AP Photo/Petr David Josek), APTOPIX