The benefits of immunoglobulin shots are that they regulate the body’s immune system and improve the ability of infected patients to fight disease. Immunoglobulin is made by mixing immunoglobulin fractions extracted from the plasma of healthy blood donors with plasma, and the main component is a broad-spectrum anti-body substance. It can be used for primary immunoglobulin deficiencies, such as x-linked hypoimmunoglobulinemia; secondary immunoglobulin-deficiency diseases, such as severe infections and neonatal sepsis; and autoimmune diseases, such as primary thrombocytopenic purpura and Kawasaki disease. Since antibodies bind to antigens and mediate the immune response, immunoglobulin improves immunocompetence to a certain extent in patients infected with pathogens. The use of the drug may cause local erythema, systemic allergic reactions. It is contraindicated in people who are allergic to immunoglobulin. Note that the drug can not be used when its properties have changed. It is recommended to use immunoglobulin under the supervision of a doctor and avoid self-medication.