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HIV P24 Ag and ABS (HIV COMBO) at 7 weeks after exposure

Question: 

Hi Sir,

I am male 37 years old. I had unprotected vaginal sex after drinking in a night club. 7 weeks later I did all sti's test in the lab including HIV P24 Ag and ABS (HIV COMBO) which turns Non-Reactive. Can I consider this test as conclusive?

Answer: 

Hello,

Thank you for your inquiry. From what we gather from the question, you were asking about the conclusiveness of a non-reactive HIV p24 Ag/Ab test (4th Generation EIA "Combo" Test).

After 6 weeks, the results from an HIV Combo test are considered conclusive by most HIV specialists as it can accurately diagnose 99% of HIV infections after this time (1). Since your HIV test was conducted 7 week post-exposure, the results are very likely to be accurate. Some physicians and guidelines recommend re-testing after 3 months for completely conclusive results.

Recommendation: Refer to a physician for other health related questions.

Regards,

AIDS Vancouver Helpline/Online, Marie