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can I rely on my results?

Question: 

 Hi, I had unprotected sex with a CSW in Cuba back in July 25. I have tested negative at 1, 4, 8 and 13 weeks here in DC area. The tests were EIA 3rd generation (only antibody). Can I consider my 13 weeks test as conclusive?

Answer: 

 Hi there and thank you for using the AIDS Vancouver Helpline as your source for HIV/AIDS related information. 
 
Unprotected sex poses a high risk of HIV transmission, so it is good to hear that you got tested. Using a condom is still the most effective way to protect against HIV and other STIs, because if the condom did not fail or break, then there is really no way for HIV to get through the latex or polyurethane of the condom. However, even if the condom did break, the risk is still substantially less than unprotected sex.
 
Your negative 3rd Generation test at 13 weeks is considered completely conclusive and reliable, and you do not need to test again (provided you haven’t had any other exposures since that time). The window period for an antibody test is from 4-12 weeks (with 95% of infections detectable within 4-6 weeks) and the test is definitive & conclusive anytime after 12 weeks with a standard antibody test. Antibody testing is the most reliable and effective form of HIV testing we have available and you can trust the accuracy of these results.
 
I hope this answers your questions and please let us know if we can provide any more information.
 
Take care,
 
Stephanie
AIDS Vancouver Helpline Volunteer
604.696.4666, Monday-Friday 9am-4pm PST
helpline@aidsvancouver.org