Replacement therapy in adults, children and adolescents (0-18 years) in:• Primary immunodeficiency syndromes with impaired antibody production • Hypogammaglobulinaemia and recurrent bacterial infections in patients with chronic lymphocytic leukaemia (CLL), in whom prophylactic antibiotics have failed or are contra-indicated.• Hypogammaglobulinaemia and recurrent bacterial infections in multiple myeloma (MM) patients.• Hypogammaglobulinaemia in patients pre- and post-allogeneic hematopoietic stem cell transplantation (HSCT).