Hepatitis B 13 positive is an indication that the body is infected with the hepatitis B virus and that the hepatitis B virus is actively replicating. Generally, the first item is hepatitis B surface antigen; the second item is hepatitis B surface antibody; the third item is hepatitis B e antigen; the fourth item is hepatitis B e antibody; and the fifth item shows hepatitis B core antibody. So 13 is positive for hepatitis B surface antigen and positive for hepatitis B e antigen at the same time. A positive hepatitis B surface antigen indicates infection with the hepatitis B virus, while a positive hepatitis B e antigen is a sign that the body is infected with the hepatitis B virus and that the hepatitis B virus is actively replicating. It is rare for 13 alone to be positive, and at the same time the fifth item will also be positive, that is, hepatitis B major triple-positive. If you further refine the quantification of hepatitis B virus, generally the virus replicates heavily.