Hepatitis B antibody is generally recommended to be checked once every 3~5 years, and if it is found that the antibody titer is insufficient, it is necessary to consider receiving booster shots or even re-vaccination of Hepatitis B vaccine. After receiving hepatitis B vaccine, when it is clear that the body has produced enough hepatitis B surface antibody, it is generally recommended to receive a test every 3~5 years in order to ensure that the body has enough antibody to produce protective power. If the antibody titer is found to be between 10IU/L and 100IU/L, a booster vaccination is needed; if the antibody titer is found to be lower than 10IU/L, a new hepatitis B vaccination is needed. The more common adverse reactions of hepatitis B vaccine are redness, swelling, pain and nodules at the site of vaccination, in addition, it may cause fever and other adverse reactions, fever, hepatitis and acute disease patients are prohibited. It is recommended to consult a specialist before receiving the hepatitis B vaccine.