Adjunctive treatment with high-titre convalescent plasma in severely and critically ill COVID-19 patients – a safe but futile intervention. A comparative cohort study

Wolfgang Paul Hoepler; Lisa Weidner; Marianna Theresia Traugott; Stephanie Neuhold; Elias Laurin Meyer; Alexander Zoufaly; Tamara Seitz; Reinhard Kitzberger; Sebastian Baumgartner; Erich Pawelka; Mario Karolyi; Alexander Grieb; Julian Hind; Hermann Laferl; Emanuela Friese; Christoph Wenisch; Stephan Walter Aberle; Judith Helene Aberle; Lukas Weseslindtner; Christoph Jungbauer