Immunoglobulin injections can be given to immunocompromised people on medical advice, but not to all people. Intravenous immunoglobulin is suitable for people with secondary immunoglobulin deficiencies such as neonatal sepsis and severe infections, autoimmune diseases such as Kawasaki disease and primary thrombocytopenic purpura, as well as X-chain hypo-immunoglobulinemia, etc. The rate of titration and the dosage of the drug should be followed by the doctor’s instructions and should not be adjusted without authorization. The drug has the therapeutic effect of immunomodulation and immune replacement, and intravenous infusion can increase the level of IgG, thus enhancing the body’s ability to resist infection. However, the drug should not be used in immunocompromised people who are allergic to human immunoglobulin, or who have a selective IgA deficiency with IgA antibodies, or who have a history of other severe allergies. Adverse reactions such as headache, nausea, and panic may occur during intravenous infusion of immunoglobulin, and the patient’s vital characteristics and general condition should be closely monitored. Note that immunoglobulin must be used under medical supervision, and should not be infused and used privately.