Hepatitis B surface antibody is less than 10, if the hepatitis B surface antigen is also negative, there is no contraindication to vaccination, you can take the vaccine at any time. Hepatitis B surface antibody is less than 10 and hepatitis B surface antigen is negative, which means that the titer of hepatitis B protective antibody is low, and it is necessary to take vaccine to increase the titer of antibody and enhance the protective power, and you should go to the regular hospital as soon as possible to take hepatitis B vaccine, and the titer of antibody should be increased to more than 10 (that is, the hepatitis B surface antibody is positive) in order to play a role in preventing hepatitis B. If the hepatitis B surface antigen is positive, it means that you are already infected with hepatitis B. If hepatitis B surface antigen is positive, it means that hepatitis B has been infected, and it is recommended to consult the doctor in time, improve the quantitative examination of hepatitis B virus, liver function, liver ultrasound and other examinations, and if there is an indication for antiviral treatment, treat it in time. Hepatitis B vaccine basic immunization, a course of three doses, injection time were the same day, one month, six months time, 2~3 years later can be injected a booster shot. Hepatitis B surface antibody less than 10, need to refer to the results of Hepatitis B five, under the guidance of the doctor to decide whether to vaccinate and vaccination program.