Question: hi doctor,

i had a high risk exposure in south XXXXXXX where I had unprotected vaginal sex with a white south XXXXXXX woman of unknown status.the exact event happened on april 7 of this year,2016. the woman assured me she is negative but i am really scared. since then I have been extremely scared and got tested for hiv.
1.I took the hiv 1/2 p24 combo test(cmia) after 4 weeks which was negative.
2. I took hiv-1 rna pcr qualitative after 6 weeks which was also negative.
3. I took hiv-2 dna pcr detection after 5 weeks of exposure and that also came negative. however the lower limit of detection of the hiv-2 dna pcr offered by dr.lal path labs in XXXXXXX is 900 copies/ml of plasma and i have read on the internet that hiv-2 has very lower viral load as compared to hiv-1 and may not be detected by hiv-2 dna pcr. also since HIV-2 works very slowly seroconversion may also take more time than it takes for hiv-1.
4. today after exactly 84 days(12 weeks) of exposure on XXXXXXX 30,2016 i took hiv 1/2 and p24 combo test again and it also came back negative.

So doctor based on these results can I now be 100% sure I do not have both HIV-1 and HIV-2. What is the window period of hiv-2 and is a 12 week test test conclusive for both hiv-1 and hiv-2 and do i need further testing?

Also doctor I need to travel to russia which requires an HIV certificate and I will be going vaccination for MMR,varicella,TDAP and influenza. If I undergo an HIV test after taking these vaccinations, will my result be affected . Do these vaccinations cause false negative or false positive for HIV antibody test if the test is taken a week after the vaccination?

thank you for your reply doctor.

So I dont need any further tests at 90 days or 6 months ?some websites say that window period is 90 days, some say 12 weeks and some even say 6 months and is the window period for HIV-2 the same as HIV-1, i.e. 12 weeks?

I havent had any exposure since that incident and I have learned from this experience. I will never have any sex with strangers and CSW's, not even protected.

The only reason I was concerned about vaccination was that I have read on the internet that influenza vaccine can cause false positive on HIV tests due to cross reacting anti-bodies and I would need to get another HIV test done before I travel to Russia,which requires HIV certificate. The last thing I want to see is a false positive HIV test.

Doctor I also wanted to know about the efficacy of latex condoms. If I use condoms and have protected sex even with a person having HIV with high viral load, there is no way I can get HIV from that person? Are condoms, if used correctly,100% effective against HIV?