A negative hepatitis B surface antibody test result means that there are no hepatitis B surface antibodies in the body. A positive hepatitis B surface antibody test result means that the body has hepatitis B surface antibodies. Why are people so concerned about hepatitis B surface antibodies and why is it important to stimulate the body to produce surface antibodies with the hepatitis B vaccine? It is a neutralizing antibody that can neutralize the hepatitis B virus that enters the body and prevent the hepatitis B virus from replicating in the body. Therefore, hepatitis B surface antibody is a good antibody. After the full course of preventive vaccination, about 96% of the vaccinated population will produce sufficient amount of hepatitis B surface antibodies. This protects the body from hepatitis B virus infection for an average of 12 years. However, 4% of the population does not produce hepatitis B surface antibodies after vaccination, and this does not achieve the purpose of prevention. A booster shot of hepatitis B vaccine is needed to stimulate the body to produce hepatitis B surface antibodies.