I only had one sexual partner and he got tested for HIV, it came back negative. My quesiton is, since he was the only person I have been with, do I still need to get tested if his test was negative? If so, why?

Mark H. Katz, M.D.
Regional HIV/AIDS Physician Coordinator
Kaiser Permanente of Southern California
You bring up an interesting question. Given that your partner had been tested at some point for HIV, one might assume he has participated in some behavior risky enough so as to warrant concern. If his test was negative 3-6 months after all such behavior, and you indeed believe what he says, and there was no further unprotected sex or needle sharing subsequent to that, yes, indeed you would not need a test.
Just to play devil's advocate for a moment, let's say his test had been negative one week before you got together. But three days later he participated in high-risk activity and contracted HIV. You would have been at risk yourself of acquiring this from him, even with his "negative test."
I'm not saying you need a test after one sexual contact--and you do not state the specifics of the activity so we do not know if it were high-risk or not. But the real take-home lesson here is that no one can really figure out for you if you have been infected for the virus or not. If you are concerned, and/or if you participated in unprotected sex or needle-sharing, then the official word is that you should be screened to be sure you did not acquire HIV.
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