The five tests of hepatitis B, namely the hepatitis B two-and-a-half tests, are mainly surface antigen, surface antibody, which is a pair; E antigen, E antibody, which is a pair; and the last one is core antibody. Their test results negative positive is not the same, representing the results are not the same. Specifically as follows: 1, surface antigen positive, indicating that there is hepatitis B virus infection; 2, if the surface antibody positive, surface antigen negative, indicating that hepatitis B vaccination successful, no hepatitis B virus infection, immunity, resistance to hepatitis B virus; 3, if the e antigen positive, indicating that there is hepatitis B major triplet, that is, indicating that the body hepatitis B virus replication is more active, may have some infectious. Generally E antigen and e antibody are a pair, e antigen negative, e antibody positive, indicating that there has been hepatitis B virus infection, but now produces antibodies; 4, positive core antibody, indicating that there was once hepatitis B, as long as the hepatitis B virus infection, the core antibody will be positive.