« Go Back

Window Period

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 ?

HIV status

Dear Sir

i have an risky exposure with an lady around 9 and half months before.

I have an gone through a couple of test in this ten months like (ELISA,ELFA,CMIA) all test came.And also i go through hepatitis b and VDRL also that result come negative.

Please let me know shall i consider this result as conclusive or any other further test like western Blot test is required to confirm the presence of HIV in body

99 day non reactive rapid immunochromatographic assay

hi i am jinx from the philippines i had unprotected anal (im on top) with a stranger on march 1, 2016 and got i got tested on june 9, 2016 in a government building that offers free test the test was rapid immunochromatographic assay. the city in which i live is hiv free from 1998 to 2012 but im still confused because i had hiv symptoms that might be nothing more than just a result of heat (summer here is very hot in fact a almost 10 people from where i live died of heat exhaustion). i had rashes in my neck and shoulders. and tired other than that no more symptoms that i saw on the internet *question should i get tested again or feel safe and how accurate is a rapid immunochromatographic assay thanks

HIV Test Result


I'm a 28 year old Indian male. I had a high risk exposure on 30th April '16. I had anal sex with another guy in which I bottomed. The other person used condom. But I started having several symptoms of HIV on week later.

I got tested twice. First on 28th of May and then on 24th of June.

Both test results were negative.

(1) Latest result: HIV - DUO by CMIA (IV th Generation test) - NON REACTIVE (0.08)
(2) Older result: ANTI HIV I & II (Serum/CMIA) - NON REACTIVE (0.07)

I still seem to have all the symptoms and test results are negative.

Should I get myself tested once at the 3 month mark and then again at 6 month mark ?

Please advice. Waiting anxiously for the reply.

Hiv Rapid Testing Algorthm

Hi All, im really worried i need help im 22 years old sorry for my English. i have had sex with a guy unknown hiv status he keep telling me that he get tested always. but im in full of regret for what i did and feeling guilty i start to worry when i get tonsil after 41 days it lasts for 2 Days but never had flu upto date i get tested after 10 weeks Non Reactive and the again i get tested by ( Hiv rapid testing algorithm) after 94 Days in aga khan hospital it was negative my question is

1.is my test conclusive?
2. can tonsillitis affect my result?

thank you!

i would be happy to hear from you!


Subscribe to RSS - Window Period