Hepatitis B vaccine can be repeated if you do not have antibodies after the vaccine is given, and you can choose a vaccine from another manufacturer. The purpose of the hepatitis B vaccine is to produce hepatitis B antibodies, which helps to prevent hepatitis B virus infection. It is true that some people are not able to stimulate the body to produce antibodies after receiving the hepatitis B vaccine. For the first injection of hepatitis B vaccine, three injections are usually needed, i.e., one injection of hepatitis B vaccine at the 0th month, the 1st month and the 6th month, and the 5 items of hepatitis B vaccine will be re-checked one month after the whole vaccination to see whether the antibody is produced or not. If the antibody is still not produced, you can take a booster injection of hepatitis B after an interval of 1 to 2 months or change the vaccine of other manufacturers, and most of the people can produce antibody through booster vaccination.