Hepatitis B surface antibody is the immunity conferring antibody that appears after infection with the hepatitis B virus. It is also detectable following vaccination for hepatitis B. Both qualitative and quantitative tests are available. Qualitative results are reported as positive or negative. A positive result corresponds to an antibody level greater than 10 mIU/mL, which is indicative of immunity. For most purposes, including screening for previous hepatitis B infection and routine post-vaccination follow-up, the qualitative assay is the test of choice, and is less expensive than the quantitative assay.
Specimen requirement is one SST tube of blood.
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