Hi, Recently my Mom(Age 52) underwent health check up, and in her liver test section following was mentioned : This is the initial detectable marker found in serum in the incubation period of HBV infection. The titer of HbsAg peaks at or shortly after the on set of elevated serum enzymes. The clinical improvement and decrease in enzyme concentration is paralled by fall in HbsAg titers and subsequently disappearance. The duration of HbsAg positivity is variable depending upon the clinical course of disease. HbsAg is detected in serum a month after the exposure, peaking in preicteric phase and disappearing 1-13 weeks after the onset of enzyme abnormalities. Persistence of HbsAg after the complete clinical recovery indicates a carrier state. Vaccination against HBV does not cause HbsAg positivity. Causes of HbsAg positivity are acute HBV infection and reactivation of chronic HBV infection. As I googled I found it related to Hepatitis B, but not sure what all this means. Please tell me what follow up tests/medical care is required in this case ? Thanks and regards, Nitin Yadav