Infection with hepatitis B virus mainly means positive hepatitis B surface antigen. Generally, if the hepatitis B surface antigen is positive, it indicates infection with hepatitis B virus, and if the hepatitis B surface antigen is negative, there is no infection. For people infected with the hepatitis B virus, there are two types of cases, one is a hepatitis B carrier, that is, liver function is normal, hepatitis B surface antigen positive does not require special treatment, regular review can be. The other is a hepatitis B patient, that is, liver function is not normal, generally the transaminases need to be more than twice the upper limit of the normal value, hepatitis B surface antigen positive, hepatitis B DNA is also positive, need to be treated.