Hepatitis B two pairs of half can check hepatitis B. Hepatitis B two pairs of half is the pathogenic markers of hepatitis B, is the main laboratory method to diagnose hepatitis B. Hepatitis B two pairs of half includes hepatitis B surface antigen, hepatitis B surface antibody, hepatitis B e antigen, hepatitis B e antibody and core antibody, people infected with hepatitis B virus will produce the corresponding antigen and antibody through their own immunity if infected with hepatitis B, hepatitis B two pairs of half will appear the corresponding positive As a result, different hepatitis B pathogenic markers indicate different meanings. If the hepatitis B surface antigen is positive, accompanied by positive hepatitis B e antigen and positive hepatitis B core antibody, this is the so-called major triplet, which indicates hepatitis B virus infection and active replication of hepatitis B virus. If the hepatitis B surface antigen is positive, along with positive hepatitis B e antibody and positive hepatitis B core antibody, this is a minor triplet, which also indicates hepatitis B virus infection. Infection with inactive viral replication and positive hepatitis B surface antibody indicates infection with the hepatitis B virus and that the virus has been cleared or produced by hepatitis B vaccination.