Study of Subcutaneous Immune Globulin in Patients Requiring IgG Replacement Therapy

Inclusion Criteria: * Subjects with primary humoral immunodeficiency, namely with a diagnosis of Common Variable Immunodeficiency (CVID) as defined by the Pan-American Group for Immunodeficiency (PAGID) and European Society for Immunodeficiencies (ESID), X-linked agammaglobulinemia (XLA) as defined by PAGID and ESID, or Autosomal Recessive Agammaglobulinemia * Chest X-ray or CT scan obtained within 1 year prior to enrolment Exclusion Criteria: * Newly diagnosed PID, i.e. subjects who have not previously received immunoglobulin replacement therapy * Ongoing serious bacterial infection at the time of screening * Malignancies of lymphoid cells such as lymphocytic leukemia, Non-Hodgkin's lymphoma and immunodeficiency with thymoma * Allergic or other severe reactions to immunoglobulins or other blood products associated with high anti-IgA Additional criteria may apply and examination by an investigator is required to determine eligibility.