IVIg can be used in all age ranges, unless otherwise specified below.Replacement therapy in:Primary immunodeficiency syndromes with impaired antibody production.Hypogammaglobulinaemia and recurrent bacterial infections in patients with chronic lymphocytic leukaemia, in whom prophylactic antibiotics have failed.Hypogammaglobulinaemia and recurrent bacterial infections in plateau phase multiple myeloma patients who have failed to respond to pneumococcal immunisation.Children and adolescents (age 0-18) with congenital AIDS and recurrent bacterial infections.Hypogammaglobulinaemia in patients after allogeneic haematopoietic stem cell transplantation (HSCT).ImmunomodulationPrimary immune thrombocytopenia (ITP), in patients at high risk of bleeding or prior to surgery to correct the platelet count.Guillain Barré syndrome.Kawasaki disease.