Functional cure, defined as durable hepatitis B surface antigen (HBsAg) and hepatitis B virus (HBV) DNA titers below the lower limit of detection (LLOD), is associated with better clinical outcomes of ...

The definition and clinical use of common HBV serological markers are shown in Table 2. HBsAg is the hallmark of HBV infection and is the first serological marker to appear in acute hepatitis B.