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Window Period

Affect of Meningitis, Tetanus and Diphtheria vaccination on HIV test

Hi, I had unprotected sex on April 2016 and 2 months after that I had a Miningitis, Tetanus and Diphtheria vaccination.

I want to know:
1. Do the vaccinations have affect on HIV test?

2. Which type of HIV test is more reliable?

3. When should I take the HIV test?

I would appreciate it if you answer me

HIV Test and Anxiety


I hope you can answer on my queries.

I had a risky exposure (anal no condom and no ejaculation inside) last September 18, 2015 but my partner always says that he's negative. I believed in him so I moved on. I had another intercourse last March 30, 2016 but it has a condom and lube. I even checked if the condom was broken and fortunately, it was not broken. I had oral sex as the bottom last April 13, 2016 and no ejaculation. I have no mouth sores or any mouth problems that time.

I got tested for HIV at home using HIV test kit and it was negative last May 16, 2016 and June 23, 2016 at a local health center using Rapid ICT and it was negative for HIV, Hepa B and Syphilis.

So, my last HIV test was June 23, 2016 and it was negative. Can I at least relax for now because my risky exposure was 9 months ago, the protected sex was 94 days ago and the oral sex with no ejaculation was 79 days ago? Will my 9 month exposure will be false negative because I had sex again last March 30 with condom before taking the test last June 23, 2016?

Thank you so much and I'm from the Philippines. I hope you can answer my questions.

pep and testing

I know that this question has been asked but still really confused. I had an unsafe dipping incident for about 10 seconds, i was the bottom, when i realized what was going on i immediately stopped it. 48 hr later i was on pep (truvada and isnentress) 4th generation ab/ag w/rfl negative also neg rapid. finished the 30 days, 5 days later went in had another rapid test and 4th generation and both negative. dr told me i was in the clear, he said even antigen or antibody at a low level would of been picked up by the their 4th gen test. I questioned it considering everything i had read on the internet about pep maybe delaying seroconversion. he said i was clear but if i wanted to be cautious i could do another rapid test at 3 months but that he has never seen the 4th gen test right after pep get it wrong. please help. nervous wreck.

delay seroconversion

delay of seroconversion by immune defficiency

4th ELISA negative


i had unprotect sex in the Aug 2015, i had a 3th elisa test in Nov 2015 (i believe no more than 15 days to 3 months) turned out is a negative. then i did another test, which was a 4th elisa in Jan 2016 (no more than 15 days to 6 months). but i heard people were saying should be more than 6 month to be have a conclusive. Im worry it right now, should i take one more to have a conclusive? i really want to move on from this thing. please give some suggestion, thank you!!


Hi. This is my question.
Searching the internet I found websites specializing in HIV, HIV experts and some people say that the window period for HIV testing is extended to 12 months if the person coinfected with HIV and hepatitis C at the same time or if the person has acute hepatitis C infection and HIV infected during the process.
This raised my anxiety much depressed me and knocked me down thinking that the tests I have done no avail at all.
My exposure risk was accidentally pitching with a needle previously used at a party almost immediately.

My concern is because they have reported at least three cases in which HIV and hepatitis C is acquired at the same time and the time to test positive was extended to 12 months, although this was I think in the past.

My questions are as follows, I hope you can help:

1.-The window period for HIV testing remains 12 weeks or three months even if coinfected with hepatitis C at the same time or filed with acute hepatitis C infection?
2. Proof of 4th generation HIV at 12 weeks is conclusive even in cases of simultaneous coinfection with hepatitis C?
3. The window period of HIV testing 4th generation is extended in cases of coinfection with hepatitis c, should re-test at 6 months?
4. It can be conclusively considered an HIV test at 12 weeks even in cases of coinfection in the same exposure with hepatitis c?
5.- If a person becomes infected with both viruses at the same time a test combo 4th generation would be able to detect the p24 antigen even if you have not yet produced antibodies?

Are my test conclusive ?

İm 21 yo man and 80 days ago i had 20 seconds unprotected vaginal exposure.İ had Anti-hiv1/2+p24 antigen test (i think this called 4th combo test and there was one value on result paper ) 19,31 and 42 days after exposure.All of them came back with negative.İ will test again after 12 weeks.But here is my questions
1-Are my tests conclusive ?
2-is there any chance to turn to postive after 12 weeks ?
İf answered i will be very glad.Thank you.


you have persistently wrote " 21-25 days is when one can have detectable antibodies and up to 95% of infections can be detected in 4-6 weeks of infection" I swear i have almost perused through all your posts and i have not seen any one write that they have had their HIV infections detected in just 3-6 weeks on especially 3rd generation tests including the rapid tests. This leaves me in doubt that these tests can detect infections in just weeks,, so one has to actually wait until after 3 months or even more.


Good work team,
Recently a medical practitioner told me that the delayed reactivity of a standard antibody test possibly up to 3 or 4 months window period may be determined by strongness of one's blood group. She said that those with blood group O may delay to react in case HIV postive, I am blood group O' Rs+ and have tested -ve in last 8-9 weeks. Is it possible if the result remains the same at 12 weeks, i might have to wait for atleast a month due to my blood group, from Uganda


Good morning , I have many doubts and would like clarification.
What is the maximum period known in the medical literature of late of HIV seroconversion ?
In recent years , with the use of the 4th generation tests have heard reports of seroconversion after 12 weeks ?
How safe window for NAT assays?
Patient takes to produce antibodies and be with high viral load will have tb p24 detectable ?
The only low P24 when anticoportos present?
I am Brazilian and here I vaccine for H1N1 flu, may have abnormal tests for antibodies, what to do in this case? Is there any test that can be done and is not subject to false positive or negative ?


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