HBsAg False Positive

Geoffrey D. Block, MD gdb at med.pitt.edu
Sat Apr 5 13:58:21 EST 1997

Steve Fischer wrote:
> Can anyone tell me:
>         The percentage of false positive reactions on the Hepatitis B Surface
> Antigen Test.
>         If being immunized for Hep B can cause a positive reaction on the HBsAg
> Test
> Thanks

The false positive rate for the antigen is very very low. Successful Hep
B immunization gives you HBsAb (antibody), not antigen, as long as the
test is done a few days to weeks after the last vaccine injection. 


Geoffrey D. Block, MD
Protein Research Laboratory
Department of Surgery
University of Pittsburgh School of Medicine
Pittsburgh, PA  15261

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