Hepatitis B surface antibody 18.8mIU/ml is not serious, such a test result is better, indicating the production of protective antibodies, at this time, it is recommended to check the five items of hepatitis B. If the other items are negative, then it is recommended to inject the hepatitis B vaccine booster shot to improve the antibody titer. Hepatitis B surface antibody test result of 18.8mIU/ml indicates that protective antibodies have been obtained after recovery from previous infection with hepatitis B virus, another situation is the result of hepatitis B vaccination. You can distinguish between these two cases by checking the Hepatitis B Penta test and consulting your physician based on the results. Hepatitis B surface antibody 18.8mIU/ml can be timely consultation, complete the hepatitis B penta test, consult the physician to decide whether to inject hepatitis B vaccine. In daily life, pay attention to develop good habits, avoid drinking alcohol, late night and hard work.