 - A history of or current, active hepatitis B infection defined as positive hepatitis B surface antigen HBsAg test or positive hepatitis B virus HBV DNA in candidates with isolated hepatitis B core antibody HBcAb positivity, defined as negative HBsAg, negative hepatitis B surface antibody HBsAb, and positive HBcAb within 24 weeks prior to study entry. NOTE: Candidates who are positive for hepatitis B surface antigen but who are HBV DNA negative are permitted in the study. 