Hepatitis B five items, including hepatitis B surface antigen (HBsAg) and hepatitis B surface antibody (anti-HBs), hepatitis B e antigen (HBeAg) and hepatitis B e antibody (anti-HBe), hepatitis B core antibody (anti-HBC). 1. The normal value of hepatitis B surface antigen is$€˂0.5ng/mL, exceeding the normal value is considered positive, and positivity indicates the presence of hepatitis B virus (HBV) infection. 2. The normal value of hepatitis B surface antibody is$€˂10mIU/mL, exceeding the normal value is considered positive, and a positive value indicates immunity to hepatitis B virus. 3. The normal value of hepatitis B e antigen is$€˂0.5PEI/mL, which is positive if it exceeds the normal value, indicating that the hepatitis B virus is in replication state and is infectious, and the larger the value, the stronger the infectiousness. 4.The normal value of hepatitis B e antibody is$€˂1.5PEI/mL, which is positive if it exceeds the normal value, and positive indicates that the hepatitis B virus replication is mostly in a quiescent state and the infectiousness is reduced. 5. The normal value of hepatitis B core antibody is$€˂0.9 PEI/mL, which is positive if it exceeds the normal value, and positive indicates previous infection or current infection of hepatitis B virus. Therefore, hepatitis B five quantitative reference as described above, generally used to determine whether the infection of hepatitis B or a rough estimate of the level of viral replication of the preliminary examination, the clinical use of different combinations of hepatitis B five to determine the status and regression of infection.