Hepatitis B Surface Antibody 42.26 IU/ml means Hepatitis B Surface Antibody Positive. Hepatitis B surface antibody less than 30 IU/ml is weakly positive, 30-100 IU/ml is in the positive range, and more than 100 IU/ml means the antibody level is the best. Hepatitis B surface antibody 42.26 IU/ml indicates that there are protective antibodies against hepatitis B virus in the body, which can resist the attack of hepatitis B virus, hepatitis B surface antibody is positive. However, if it is not greater than 100IU/ml, it means that the titer of hepatitis B surface antibody is not high. It is recommended to have a re-check in about half a year, and if the titer is too low, you can take a booster shot of hepatitis B vaccine to make sure that the titer of hepatitis B surface antibody should be better than 100IU/ml. If there is hepatitis B surface antibody of 42.26IU/ml, you can not worry too much, and check it after half a year, if the titer is lowered, then you need to consult a doctor in time, and take a booster shot of hepatitis B vaccine, so as to keep it at a higher level.