The main role of human immunoglobulin is to prevent measles, and it can be used in combination with antibiotics to increase the effectiveness of treatment for certain serious bacterial or viral infections. Human immunoglobulin injections are passive immunotherapy. It involves the delivery of a large amount of antibodies within the immunoglobulin to the recipient to bring him or her from a low or no immunity state to a transient state of immune protection. Since antibody-antigen interactions can directly neutralize toxins and kill bacteria and viruses, immunoglobulin has a role in preventing bacterial and viral infections. Adverse reactions such as redness, swelling or pain at the injection site, fever, rash and hives may occur in a small number of patients using human immunoglobulin, but the symptoms usually resolve on their own and do not require special treatment. In addition, it is contraindicated in patients with known hypersensitivity to the components contained in human immunoglobulin, in patients with selective IGa deficiency who have IGa antibodies, and the use of the drug in pregnant and lactating women is not clear. If you need to use human immunoglobulin, please consult a professional doctor and follow the doctor’s instructions for rational use of medication.