For up to the first 8 weeks, subjects will continue to receive their own IVIG treatment at the same dose and frequency as prescribed prior to entry into the study. Then, subjects will be randomized to receive HyQvia administered through a subcutaneous infusion (i.e. a small needle inserted under the skin) every 2, 3, or 4 weeks for a total of 10 to 15 weeks. Overall, participants may be in the research study for about 28 weeks.
Principal Investigator: Suraj Muley, MD