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HIV Risk - 4th generation


Dear Team,

Yesterday I had unprotected sex with lady I met in the club, next day I asked her to come with me to do HIV test 4th generation, The her result was negative.

I’m still worried, Do I need to do test after one month?

Thank you for your support and advice.



Thank you for your inquiry. From what we gather from the question, you were asking about accessing an HIV test after engaging in unprotected sex. From the information given, this scenario is determined to be High Risk (evidence of transmission through these activities and is the majority of cases of transmission). It is responsible to get an HIV test after activities such as unprotected sex.

The scenario mentioned above does meet the three components of the Transmission Equation. You should still access HIV testing even after finding out that your partner tested negative the day after the potential exposure. This is because the person you had sex with may have very recently acquired HIV and is still undetectable by the 4th Generation test. It would be responsible for both of you to access a 4th Generation test 6 weeks after the exposure. At this point most HIV specialists agree that the results from the test are conclusive (1). Some physicians and guidelines recommend re-testing after 3 months with an antibody test for completely conclusive results.

Recommendation: Refer to a physician for an HIV test 6 weeks post-exposure.


AIDS Vancouver Helpline/Online, Marie