Cuvitru [Immune Globulin Subcutaneous (Human); SCIg] 20% is a ready-to-use medicine that is given under the skin (subcutaneously) to treat primary immunodeficiency (PI) in adults and children 2 years of age and older.1 Cuvitru (SCIg) is not for use in people who: Have had a severe allergic reaction to immune globulin or other blood products. Have a condition called selective (or severe) immunoglobulin A (IgA) deficiency. It is available in vial form for subcutaneous infusion, containing a 20% solution of immune globulin (human).1