Hepatitis B Core Antibody 3.9 generally means that the Hepatitis B Core Antibody test value is 3.9 PEIU/ml, this result is positive, the normal value of Hepatitis B Core Antibody is less than or equal to 0.9 PEIU/ml. Hepatitis B core antibody is one of the five tests of hepatitis B, the normal value is less than or equal to 0.9PEIU/ml, when the test result is 3.9PEIU/ml, it means that the result is abnormal, positive, representing that the human body has been infected with hepatitis B virus in the past or in the near future, and whether or not it is contagious needs to be combined with the results of the other four items of the five tests of hepatitis B to be considered. If only hepatitis B core antibody is positive in hepatitis B five items, and the other four items are negative, it means that the body has been infected with hepatitis B virus in the past, but has been cured now. If combined with positive Hepatitis B surface antibody, it means that the body has produced protective antibodies. If the combination of hepatitis B surface antigen is positive, it means that the body is being infected by hepatitis B virus, and further examination is recommended before targeted treatment.