Intravenous Immunoglobulin (IVIG) is a medical treatment that involves administering a solution containing antibodies directly into a patient's bloodstream. These antibodies are derived from the plasma of healthy donors and help boost the immune system. IVIG is commonly used to treat various conditions, including autoimmune diseases, immunodeficiencies, and certain infections. The treatment works by providing the body with the necessary antibodies to fight off infections and regulate immune responses. IVIG can help reduce inflammation and improve the overall function of the immune system, making it a valuable option for patients with weakened immunity or autoimmune disorders.