Hepatitis B two pairs of half to determine the performance of hepatitis B. The hepatitis B two-and-a-half test, or hepatitis B five tests, can be divided into qualitative and quantitative tests, and the test results can determine whether the HBV virus has been infected, or is in the recovery period, or has been injected with the hepatitis B vaccine. The quantitative test is more accurate than the qualitative test. The hepatitis B two-to-one test mainly includes surface antigen, surface antibody, e antigen, e antibody and core antibody, of which the qualitative test can only provide positive, negative and weakly positive results for each index, while the quantitative index can provide specific values for each index.