How long does the hepatitis B vaccine last?

Hepatitis B vaccine needs to be injected with 3 needles. After the newborn is born, the first needle will be injected immediately. After one month, the second needle will be inoculated. After 6 months, the third needle will be inoculated. Hepatitis B antibody can be checked at 8 months. If there is antibody in the body at this time, the antibody titer is relatively high, indicating that the vaccination is successful and there is already strong resistance.