Opera Goes On in Salzburg, With Lots and Lots of Testing. Salzburg Festival, Classical Music, Coronavirus (2019-nCoV), Opera, Vienna Philharmonic, Crebassa, Marianne, Froschauer, Daniel, Hinterhauser, Markus (1958- ), Loy, Christof, Cosi Fan Tutte (Opera), Rabl-Stadler, Helga, Dreisig, Elsa (1991- )