Immunoglobulin replacement therapy is a medical treatment used to help individuals with weakened immune systems, often due to conditions like primary immunodeficiency disorders. This therapy involves administering immunoglobulins, which are antibodies that help the body fight infections. The treatment can be given through injections or intravenous infusions, depending on the patient's needs. The goal of immunoglobulin replacement therapy is to boost the immune response, reducing the frequency and severity of infections. Patients receiving this therapy may experience improved overall health and a better quality of life, as their bodies become more capable of defending against harmful pathogens.