Two members of the audience wearing a protective face mask sit at their place as flowers bouquets are placed on the empty seats prior to the opera La Traviata by Italian composer Giuseppe Verdi, at the Sofia Opera, in Sofia, on February 18, 2021. - Traviata, Norma, Tosca, the Swan Lake: the Sofia Opera offers a rich repertoire during this month of February and is sold out despite the third wave of Covid-19. Musicians of the orchestra wear facemasks and are installed on the floor to be far from the singers, the audience sit only in the balconies spots, where only one seat in three, is occupied and on the empty seats, bouquets of artificial flowers separate the spectators. (Photo by Nikolay DOYCHINOV / AFP)