Hepatitis B vaccine is mainly used for the prevention of hepatitis B. One injection is given at 0, 1 and 6 months of age. According to the course of injection of hepatitis B vaccine to produce antibodies, can effectively play a role in preventing infection of hepatitis B virus, adults and infants and young children injected with the same course of treatment, respectively, on the day of the injection of the first dose, one month after the injection of the second dose, six months after the injection of the third dose. Adverse reactions may include pain, redness and swelling at the injection site, most of which will recover on their own, while some patients may experience chills, fever, vomiting and allergic reactions. Contraindications: allergic to the vaccine components are prohibited from using the vaccine for those who suffer from acute diseases, severe chronic diseases, acute exacerbation of chronic diseases, and fever. Hepatitis B vaccine should go to regular medical institutions for vaccination, and leave the vaccination unit half an hour after vaccination.