COVID-19(27) Patient(21) SARS-CoV-2(19) majority(8) required(8) increased mortality(8) reported(7) occurred(7) Multiple myeloma(7) mRNA vaccination(7) immunodeficiency(6) management(6) pandemic(6) Treatment(5) disease(5) vaccination(5) Mortality(5) coronavirus(5) death(5) Cell(5) ICU admission(5) clinically(5) patients(5) plasma cell disorder.(5) chronic lymphocytic leukemia(5) disorder(5) plasma(5) implication(4) immune(4) with COVID-19(4)