Immunity: A positive or "reactive" Hepatitis B surface antibody (ab) result means that you are demonstrating immunity to the Hepatitis B virus either through successful vaccination or a previous acute Hepatitis B infection. Tests for Hepatitis B are generally ordered in a panel of at least 3 tests (HBsAg, HBsAb/Anti-HBs and HBcAb/Anti-HBc) and at least all 3 are needed to make a proper diagnosis.
Answered 7/7/2019
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