The hepatitis B surface antibody test (HBsAb) detects antibodies in the blood to determine if someone is immune to the hepatitis B virus (HBV). A negative or nonreactive result means the individual is ...

Hepatitis B testing can show whether you have a current or past HBV infection and whether you have antibodies from a hepatitis B vaccine. Hepatitis B is a viral infection caused by the hepatitis B ...

Hepatitis B is a viral infection that impacts the liver. To test for hepatitis B, a doctor can perform a blood test that detects hepatitis B surface antigens. A positive result indicates a hepatitis B ...