Multiple myeloma(4) Ixazomib(4) acyclovir(4) Varicella-Zoster Virus(4) COVID-19(2) hematological disease(2) Reactivation(1) zoonosis(1) Anti-COVID antibody(1) EBV(1) hepatitis E virus(1) Pneumonia(1) preventive(1) Genotype(1) Nosocomial infection(1) HBV(1) HBV.(1) Exosome(1) transfusion(1)