A quantification of hepatitis B surface antibody greater than 100mIU/mL is considered positive and usually indicates that the body has a certain degree of immunity to the hepatitis B virus, which is a relatively good phenomenon. Hepatitis B surface antibodies are protective antibodies that can clear the hepatitis B virus. A quantification of hepatitis B surface antibodies greater than 100 mIU/mL indicates that the subject has probably received the hepatitis B vaccine and that the hepatitis B vaccine has worked in the body to produce more hepatitis B surface antibodies. The higher the value of the hepatitis B surface antibody test, the stronger the protective power of the antibody and the more effective it is in preventing hepatitis B. At the same time, a hepatitis B surface antibody quantification greater than 100 mIU/mL can also be due to the fact that the person tested has been infected with the hepatitis B virus, was an asymptomatic carrier of the hepatitis B virus or is a patient with hepatitis B. However, because the autoimmune system is intact, the body clears the hepatitis B virus and produces surface antibodies, thus avoiding re-invasion of the hepatitis B virus. Usually hepatitis B surface antibodies appear 3-6 months after infection and can last for many years. In addition, if the combined hepatitis B five tests are accompanied by positive or abnormal hepatitis B surface antibody quantification greater than 100 mIU/mL, it is recommended to promptly seek medical consultation for other laboratory tests and imaging examinations, and to analyze them specifically in conjunction with clinical manifestations.