Most of us have taken the “Hepatitis B 2.5” test, and have seen the list of Hepatitis B markers, which is directly aimed at checking whether a person is infected with the Hepatitis B virus or not, and whether he or she has antibodies or not. But in fact, many people do not know how to read this test, can not fully understand the meaning of a variety of test indicators, in the end, how to read the laboratory test, now I’ll do an answer. First of all, we first understand the structure of the hepatitis B virus. We can imagine it as an egg, hepatitis B virus is the outermost layer of the outer membrane, called the surface antigen, this layer is equivalent to the eggshell of the egg; and then to the inner membrane is the inner membrane of the virus, the inner membrane is mainly the core protein, this part is equivalent to the egg’s protein part, known as the core antigen; under normal circumstances can not be detected in the blood of the core antigen, but only to detect it can be dissolved in the components, known as e Antigen. After a person is infected with hepatitis B virus, the immune cells produce corresponding antibodies to the above three kinds, i.e., surface antibody, core antibody and e antibody, thus constituting three pairs of antigens and antibodies. However, since the core antigen cannot be detected in the serum, the hepatitis B viral markers in clinical examination mainly include hepatitis B virus surface antigen (HBsAg), hepatitis B virus surface antibody (HBsAb), hepatitis B virus e antigen (HBeAg), hepatitis B virus e antigen (HBeAg), and hepatitis B virus e antigen (HBeAg). HBeAg, HBeAb, HBeAb and HBcAb, which is what we often call “Hepatitis B two halves” test. If the first test, Hepatitis B Surface Antigen, is positive, it means that the person being tested is infected with the Hepatitis B virus. If it is negative, it means that the person tested is not currently infected with the Hepatitis B virus. If the second test “Hepatitis B Surface Antibody” is positive, it means that the person tested has developed antibodies against the Hepatitis B virus and is generally not contagious or infectious. If it is negative, it indicates that the tested person does not have antibodies.” The third test, “Hepatitis B e antigen,” if positive, indicates that the Hepatitis B virus in the tested person’s body is in the replication phase, which is the infectious phase. The fourth test, “Hepatitis B e Antibody”, if positive, indicates that the person has been infected with the Hepatitis B virus. If the fifth item “Hepatitis B Core Antibody” is positive, but all other items are negative, or only the second item is positive, it means that the person has been infected with the Hepatitis B virus, but has now produced antibodies; and HBsAg positive at the same time means that the person is now infected with the Hepatitis B virus. In fact, 60 to 70 percent of adults have been infected with the hepatitis B virus, and most can recover on their own.