Hepatitis B two pairs of half refers to hepatitis B surface antigen, hepatitis B surface antibody, hepatitis B e antigen, hepatitis B e antibody and hepatitis B core antibody. The best result for hepatitis B is that the hepatitis B surface antibody is positive and the other four items are all negative, which means that there are protective antibodies and generally there is no hepatitis B infection. Of course, there is another situation where all five indicators of hepatitis B are negative, and this situation is also possible. However, you need to get the hepatitis B vaccine to make your body produce antibodies so that it can have a protective effect. The hepatitis B vaccine requires three injections, i.e., one after the injection, one after a month, and another after six months. Then check the five indicators of hepatitis B for antibodies, if the surface antibody of hepatitis B is still negative, you need to continue the vaccination.