Hepatitis B two-half 245 positive refers to positive surface antibody, e antibody and core antibody, which means that one has been infected with hepatitis B virus and now has been cured and immunity against hepatitis B virus; or in the recovery period of acute hepatitis B. The surface antibody mainly appears after the disappearance of surface antigen and e antibody is a protective antibody, which means that the body has cleared the virus and immunity against it. Surface antibody mainly appears after the disappearance of surface antigen, and surface antibody is a kind of protective antibody, which means that the body has cleared the virus and become immune to it; e antibody mainly appears after the clearing of e antigen, which means that the virus replication is in the quiescent stage; positive core antibody means that the body is currently or has been infected with hepatitis B virus. Therefore, in hepatitis B two halves, 245 positive means that you have been infected with hepatitis B virus in the past, but have been cured, check the titer of hepatitis B surface antibody regularly, if the titer is too low, then you do not have protection against hepatitis B virus, you need to inject hepatitis B vaccine to prevent re-infection. If the titer is too low, you are not protected against hepatitis B virus and need to take hepatitis B vaccine to prevent re-infection. Or if you are recovering from acute hepatitis B, you can take antiviral treatment under doctor’s guidance, and check hepatitis B half-pair test regularly to monitor whether the surface antigen is positive again. Hepatitis B half-positive, need to consult the doctor in time, under the guidance of the doctor for further diagnosis and treatment, to avoid delaying the condition.