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HIV test one month after flu shot
Jan 9, 2006

Dr. Bob: A while back, I had unprotected anal sex with a woman (who I do not feel was is a high risk category). 8 weeks after this event, I tested negative for HIV. My friend insisted recently I re-test to be certain I am negative.(I have no symptoms and am therefore probably ok). I am, however extremely worried that I may get a call saying I am positive since I had a flu shot one month prior to the HIV re-test yesterday.

Does the ElISA still give a false positive?



Response from Dr. Frascino

Hello Ed,

Flu shots will not affect HIV-antibody tests, such as ELISAs. Vaccinations, in general, can cause a transient rise in HIV viral load for those individuals who are HIV positive; however, HIV viral load tests are not HIV-antibody screening tests.

Dr. Bob

kaposi's sarcoma

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