PPIB and hepatitis A virus infection: Photo of patient and co-ethnic doctor discussing liver. Bring this pamphlet to your doctor or clinic and ask for hepatitis B blood tests to check for hepatitis B surface antigen (HBsAg) and hepatitis B surface antibody (HBsAb). If you have never been infected with hepatitis B, you should ask the doctor to vaccinate you against it. The hepatitis B vaccine is very effective.