B08: A THIRD BNT162B2 DOSE INDUCES ANTIBODY RESPONSES AGAINST SARS-COV-2 EVEN IN PREVIOUSLY NON-RESPONDERS WITH MULTIPLE MYELOMA. (5th April 2022) - Terpos, E; Gavriatopoulou, M; Ntanasis-Stathopoulos, I; Briasoulis, A; Gumeni, S; Malandrakis, P; Papanagnou, E-D; Migkou, M; Kanellias, N; Kastritis, E; Trougakos, I P; Dimopoulos, M A