P57 PRE-EXPOSURE PROPHYLAXIS FOR COVID-19 WITH TIXAGEVIMAB/CILGAVIMAB (EVUSHELD) IN PATIENTS WITH MULTIPLE MYELOMA - I. Ntanasis-Stathopoulos; M. Gavriatopoulou; E. Eleutherakis-Papaiakovou; P. Malandrakis; V. Spiliopoulou; R.E. Syrigou; F. Theodorakakou; D. Fotiou; M. Migkou; M. Roussou; E. Kastritis; M.A. Dimopoulos; et al. (HemaSphere, 2023)