Efficacy of Tixagevimab/Cilgavimab as Pre-Exposure Prophylaxis against Infection from SARS-CoV-2 and Severe COVID-19 among Heavily Immunocompromised Patients: A Single-Center, Pros... oleh Dimitrios Basoulis, Elpida Mastrogianni, Georgios Karamanakos, Aikaterini Gkoufa, Vasiliki E. Georgakopoulou, Sotiria Makrodimitri, Maria N. Gamaletsou, Antonios Markogiannakis, Nikolaos V. Sipsas