Hepatitis B antibodies usually refer to Hepatitis B surface antibodies. Hepatitis B surface antibody of more than 40mIU/ml requires a booster shot of Hepatitis B vaccine. In general, hepatitis B surface antibody is more than 100mIU/mL, the protection of human body is stronger, and only have good immunity against hepatitis B virus. If the hepatitis B surface antibody is more than 40mIU/ml, although there is some immunity to the hepatitis B virus, the protection to the human body is not strong, and it is necessary to take another booster shot of hepatitis B vaccine to avoid infection with the hepatitis B virus. After the booster injection of hepatitis B vaccine, it is recommended to go to the hospital one month later to re-check the hepatitis B five. If the positive titer of hepatitis B surface antibody increases, it means that the antibody has been produced and there is a high probability that you will not be infected with the hepatitis B virus in a short period of time. After receiving hepatitis B vaccination, you must pay attention to rest, eat a light diet, eat more fresh vegetables and fruits, etc., and develop healthy living habits.