1. HBsAg (Hepatitis B Surface Antigen) is the outer shell protein of the hepatitis B virus, which is not infectious by itself and therefore should not be used as a marker of infectiousness.HBsAg only indicates that there has been, or is, an infection with the hepatitis B virus. HBsAg only indicates that there has been or is an existing infection with the hepatitis B virus. This alone does not indicate whether or not the hepatitis B virus is currently replicating. 2, anti-HBs (hepatitis B virus surface antibody) is a kind of protective antibody, which is a sign of immunity against hepatitis B infection. It is a symbol of hepatitis B cure or tendency to cure. 3, HBeAg (e antigen), HBVDNA, are structural components in the core of hepatitis B virus, and their existence indicates that hepatitis B virus still exists and replicates in the blood. 4, anti-HBe (e antibody), positive indicates that the replication of hepatitis B virus is not active, which is a sign that the hepatitis B virus has been infected for a longer period of time. However, if HBVDNA is positive, it means that hepatitis B virus still exists in the blood or the virus has mutated. 5.Anti-HBC(core antibody), whose main component is IgG type of core antibody. Positive is a sign of previous or current infection with the hepatitis B virus. Like HBsAg, this alone does not indicate whether the hepatitis B virus is reproducing and replicating.