Hepatitis B Immunoglobulin, or Hepatitis B Immune Globulin, is an artificial passive immunization agent that, when injected, stimulates the body’s immune system to produce protective antibodies for the prevention of hepatitis B infection. Hepatitis B immunoglobulin is currently used for three main groups of people, including babies born to mothers with hepatitis B, occupationally exposed people, and patients with hepatitis B. 1. Babies born to mothers with hepatitis B: If the mother is a patient with hepatitis B teratitis or teratitis B minor, the baby must be injected with hepatitis B immunoglobulin as early as possible to prevent the virus from replicating in the baby. 2. People with occupational exposure: for example, medical workers need to take hepatitis B immunoglobulin as early as possible when they are exposed to the blood of hepatitis B patients at work and are at risk of infection. 3. Hepatitis B patients: these patients need to take hepatitis B immunoglobulin injection as prescribed by the doctor in the process of liver transplantation or after liver transplantation, in order to prevent the new liver from being infected with hepatitis B virus again. Hepatitis B immunoglobulin needs to be carried out under the guidance of a doctor in order to achieve therapeutic effects, and patients need to strictly follow the doctor’s instructions to standardize the use of medication.