Positive items 2 and 5 of the five hepatitis B items are not hepatitis B, because item 2 is hepatitis B surface antibody, surface antibody is a protective antibody, if its simply positive, it is the result of the hepatitis B vaccination, which means that immunity to the hepatitis B virus has developed. In the case where item 5 is positive at the same time, this is also a case of having developed relevant immunity to the hepatitis B virus, but it is possible that this immunity may not be the result of the hepatitis B vaccination, but may appear after having actually been infected with the hepatitis B virus. Not all people become chronic hepatitis B patients after the hepatitis B virus infects them, but the vast majority of adults who are infected with the hepatitis B virus are able to clear it. The majority of adults who are infected with the hepatitis B virus are able to clear it. After clearance, the hepatitis B surface antibodies are likely to become positive, thus gaining the relevant immunity, but this will leave traces of the hepatitis B virus infecting people, which is the 5th positive core antibody for hepatitis B. Some people who have been vaccinated against hepatitis B and have acquired surface antibodies to hepatitis B are then exposed to the hepatitis B virus and infected with hepatitis B. The body’s immune system will clear the virus, which will then leave traces of a positive core antibody to hepatitis B. At the same time, the surface antibody to hepatitis B will remain positive.