HBsAg (
Hepatitis B surface antigen) - A "positive" or "
reactive"
HBsAg test result means that the person is infected with
hepatitis B. ... anti-HBs or HBsAb (
Hepatitis B surface antibody) - A "positive" or "
reactive" anti-HBs (or HBsAb) test result indicates that a person is protected against the
hepatitis B virus.
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