Hepatitis B two halves refers to Hepatitis B two halves, which includes Hepatitis B Surface Antigen, Hepatitis B Surface Antibody, E Antigen, E Antibody and Core Antibody. It is mainly a test to reflect whether or not one has been infected with the hepatitis B virus and whether or not one has protective antibodies. For Hepatitis B five indicators, if Hepatitis B surface antigen is positive, it suggests that one has been infected with the Hepatitis B virus, and one needs to take further tests such as liver function, Hepatitis B DNA and liver ultrasound. If Hepatitis B surface antibody is positive, it suggests that there are protective antibodies and such people will not be infected with Hepatitis B. It is currently recommended that all people need to go to the hospital. It is now recommended that all people need to get vaccinated against Hepatitis B. As long as the Hepatitis B surface antibody turns positive, it is protective.