antibodies to HBV surface Ag (anti-HBs), and HBV total core Ag (anti-HBc). Those with positive anti-HBc are at risk for HBVr. AGA’s guidance is based on a patient’s HBV infection status.
HBV reactivation (HBVr) occurs when HBV activity is no longer suppressed by the immune system in people who are either positive for the HBV surface antigen (HBsAg) or HBV core antibody (anti-HBc).