The hepatitis B tri-series refers to the five hepatitis B tests, including qualitative and quantitative. The normal test criteria for hepatitis B tri-series are the normal criteria for hepatitis B pentad. The normal criteria for hepatitis B five items can be divided into the following cases: in the first case, the patient has never been infected with the hepatitis B virus, nor has he been vaccinated against hepatitis B. The results of the five items of the hepatitis B three series should all be negative. In the second case, the patient has previously been vaccinated against hepatitis B. In this case, only the surface antibody of hepatitis B is positive, and the other four items are all negative. In the third case, the patient has previously been infected with hepatitis B and is now recovered. In this case, the second surface antibody of hepatitis B is positive, and the last of the five hepatitis B items (also known as the hepatitis B triad) may be accompanied by a positive hepatitis B core antibody, and some people may also have a positive hepatitis B e antibody. The normal criteria are basically the above three.