Anti-Hepatitis B Surface antibody(Anti-HBs) CLIA kit (Chemiluminescence Immunoassay) is an in vitro diagnostic quantitative test kit. Anti-HBs is an antibody that is directed against the hepatitis B surface antigen (HBsAg).2,3 Anti-HBs can be detected several weeks after the disappearance HBsAg. It is intended for use in medical laboratories for diagnosis and management of patients related to infection with hepatitis B virus.