Hepatitis B antibody generally refers to hepatitis B surface antibody, which is greater than 100mIU/mL and generally can persist for more than 1 year, but this time usually varies from person to person, and it cannot be ruled out that a few people’s antibody indicator will drop to less than 100mIU/mL in a short period of time. Hepatitis B antibody generally refers to Hepatitis B surface antibody, which is a kind of protective antibody beneficial to human body. Generally speaking, this antibody index needs to reach 100mIU/mL or above in order to have strong protective effect, and the higher the antibody titer, the better, generally speaking, the Hepatitis B surface antibody titer is more than 100mIU/mL and can persist for more than 1 year. Generally speaking, the surface antibody titer of hepatitis B is more than 100mIU/mL for more than 1 year. Generally speaking, the surface antibody titer of hepatitis B is more than 100mIU/mL for more than 1 year after vaccination, the surface antibody titer of hepatitis B will reach the peak after vaccination, and then it will decrease gradually. If the antibody titer falls below 100mIU/mL, a booster injection can be given to raise the antibody titer. If the antibody titer falls below 100 mIU/mL, a booster shot can be given to raise the antibody titer. If the titer falls below 10 mIU/mL, a new three-shot hepatitis B vaccine is needed. If you find that your Hepatitis B surface antibody titer is greater than 100mIU/mL, please do not worry, and follow your doctor’s instructions for regular checkups if necessary.