Hepatitis B vaccine for adults is available at hospitals and disease control centers. Hepatitis B vaccine for adults is self-paying, unlike the hepatitis B vaccine within the childhood immunization program. The procedure for hepatitis B vaccination is the same as that for children, and is based on the 0, 1, 6 principle. The five indicators of hepatitis B are rechecked one month after the vaccination to observe the level of hepatitis B surface antibody. If the titer of hepatitis B surface antibody is high, the vaccination is successful. The new guidelines say that antibodies can last 8-12 years after a successful vaccination. However, in clinical work, the five indicators of hepatitis B are usually reviewed every 3-5 years to observe the level of hepatitis B surface antibodies and decide whether to give a booster hepatitis B vaccination according to the level of antibodies. If you have hepatitis B surface antibody, it belongs to the protective antibody of hepatitis B. You don’t need to worry about being infected with hepatitis B again.