Immunoglobulin therapy is used to treat those with an IgA deficiency. This infusion helps keep our daughter’s compromised immune system working. Today is her infusion day! Our Number One needs subcutaneous immunoglobulin therapy to bolster her seriously compromised immune system. It was seriously overwhelming at first, but once you learn the ins and outs of the process, it’s not so bad. I never would have thought I would do so much nursing considering I am not a nurse!