Hepatitis B e antigen quantification of 0.31 is usually normal. Hepatitis B e antigen quantitative in different tests its normal value is not the same, in the enzyme-linked immunosorbent assay (ELISA), the normal value of hepatitis B e antigen is usually less than 2.1, in the chemiluminescence quantitative determination of its normal value is usually less than 1.0 COI, so the hepatitis B e antigen quantitative 0.31 is usually normal, the results of the test are usually negative. However, whether you have hepatitis B or not should be combined with hepatitis B five items, if hepatitis B five items are negative, it means that there is no hepatitis B virus infection, but there is no protective antibody against hepatitis B virus, so it is recommended to take hepatitis B vaccine. If the surface antigen, e antibody and core antibody are positive, which is commonly known as “minor triple positive”, it means that the body is infected with hepatitis B virus, but the contagiousness is relatively weak. Since a normal quantitative hepatitis B e antigen does not determine the patient’s condition, it is recommended that the patient should consult a doctor to clarify whether he or she is suffering from hepatitis B under the doctor’s guidance and follow the doctor’s instructions to actively treat the disease.