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Old 01-15-2008, 07:55 PM   #1
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false positive hepatitis b test from the vaccine?

I also got a general blood test and was given vague information by my doctor. They say I tested positive for Hep B, and that's about all I was told. I was kind of freaked out at the time so I didn't say anything or ask any questions, but it occurs to me that I was vaccinated against Hep B specifically about 3 and a half years ago.
I'm a little confused as to how this could have happened. Is it possible that it's a false positive or that antibodies that are supposed to be generated by the vaccine were detected? If I go back there and ask about this, what should I say?

 
Old 01-16-2008, 08:09 AM   #2
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Re: false positive hepatitis b test from the vaccine?

According to the CDC, if you've had the vaccine but not the disease, you should have a negative result on HBsAg, but positive on anti-HBs. Positive result on HBsAg usually means you actually have it, that the test found virus floating in your bloodstream. Positive anti-HBs means you are immune, that you have antibodies to the virus.

You doctor hasn't provided enough information. Go back and ask what exactly the test showed.

If HBsAg is positive, but you are not sick, the doctor will most likely recommend repeating the test in a few months. It's possible the test was just plain wrong, or it could be the virus is in you but your body is successfully fighting it off.

 
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Old 01-16-2008, 12:37 PM   #3
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Re: false positive hepatitis b test from the vaccine?

Thanks for the information. I haven't had any symptoms at all, in my entire life! I called the office where I went to get my vaccination done, and they said that it's likely the positive on the anti-HB's was what was found, but that I should ask for my lab report.

The nurse also said that if I had the virus before I got the vaccine, then I would likely be showing some kind of symptoms, and if I didn't, then the vaccine should have worked and I shouldn't have anything to worry about.

I'm sort of a hypochondriac in the first place, so needless to say this whole thing has sent me into a spiral of negative thinking. I asked if there was a more specific test to figure out what's going on, and I was told there is a super expensive test (she wouldn't give me the price) where they mix actual hepatitis with my blood sample to see how my blood reacts.

 
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