Bioequivalence Study to Evaluate the Pharmacokinetics, Safety, and Tolerability of Gammaplex® 10 and Gammaplex® 5% in Primary Immunodeficiency Diseases

The primary objective is to demonstrate the bioequivalence of Gammaplex® 10 intravenous immunoglobulin (IGIV) and Gammaplex® 5% IGIV with respect to area under the curve within a 28-day dosing interval (AUC0-28) in a cohort of adult subjects. The secondary objectives are to demonstrate the bioequivalence of Gammaplex® 10 IGIV and Gammaplex® 5% IGIV with respect to area under the curve within a 21-day dosing interval (AUC0-21) in adult subjects; to assess the pharmacokinetics of Gammaplex 10 IGIV and Gammaplex 5% IGIV including Immunoglobulin G (IgG) trough levels and to investigate the safety and tolerability of Gammaplex 10 IGIV and Gammaplex 5% IGIV in adults subjects; to assess the pharmacokinetics of Gammaplex 10 IGIV including IgG trough levels and to investigate the safety and tolerability of Gammaplex 10 IGIV in pediatric subjects.