Whether or not the first injection of hepatitis B vaccine will produce antibodies depends on whether or not the patient has had hepatitis B surface antibodies in the past. If the patient has hepatitis B surface antibodies, the first injection will usually produce antibodies, if not, the first injection will usually not produce antibodies. Everyone has different resistance and different immunity strengths, so the purpose of hepatitis B vaccination is to produce hepatitis B surface antibodies, which are protective to the body and immune to the hepatitis B virus. The higher the hepatitis B surface antibody titer, the better the protective effect on the human body will usually be. There are two ways to get hepatitis B surface antibodies, one is by getting the hepatitis B vaccine, and the other is by producing the hepatitis B surface antibodies on your own after being infected with the hepatitis B virus. Individuals who do not develop antibodies even after the third injection do so because of immunization failure. In daily life, they should have regular checkups, pay attention to bad habits, and use communal spoons and chopsticks when eating out to avoid infection with the hepatitis B virus.