Hepatitis B surface antigen: no langer detectable after 4-6 months in those who recover, persistance of HBsAg after 6 months indicates chronic infection;
Hepatitis B surface antibody (anti-HBs)
Hepatitis B core antibody (anti-HBc)
Hepatitis B core antigen (HBcAg)
Acute hepatitis B infection: HBsAg positive, IgM anti-HBc positive;
Imune status due to hep B vaccination; Anti-HBs positive
Susceptible to Hep B infection: all neg
