There is no fixed time for how long antibodies can be maintained after the hepatitis B vaccination. Generally, the value of hepatitis B surface antibody decreases year by year. If there is a hepatitis B patient in the family, it is recommended that every five years you need to go for quantitative hepatitis B five indicators to see the size of the hepatitis B surface antibody titer. If the value is less than 100 IU, it is recommended to get a booster shot. If the value is greater than 100 IU, the protection is stronger, so you will not be infected with hepatitis B virus, and you do not need a booster shot. Not all people will develop antibodies after receiving the hepatitis B vaccine. A month after receiving the vaccine, a five-item hepatitis B test should be done to clarify. If you do not have antibodies, you need to continue vaccination.