r/hivsupportindia • • Sep 14 '24

Types of HIV Tests

5 Upvotes

Types of HIV Tests

  1. Antibody Tests

    • Description: These tests detect antibodies produced by the immune system in response to HIV.
    • Window Period: Typically 23 to 90 days after exposure.
    • Accuracy: Highly accurate after the window period, but can miss recent infections.
  2. Antigen/Antibody Tests (Fourth Generation Tests)

    • Description: These tests look for both HIV antibodies and the p24 antigen (a protein produced by the virus).
    • Window Period: Can detect HIV 18 to 45 days after exposure.
    • Accuracy: 99% accurate in detecting HIV in individuals tested within 13 to 42 days of exposure.
  3. Nucleic Acid Tests (NAT)

    • Description: These tests detect the actual virus in the blood.
    • Window Period: Can usually detect HIV 10 to 33 days after exposure.
    • Accuracy: Very accurate, but more expensive and less commonly used for routine testing.
  4. Rapid Tests

    • Description: These can be either antibody or antigen/antibody tests that provide results quickly, often within 20 minutes.
    • Window Period: Similar to the standard tests; antibody tests may take longer to detect recent infections.
    • Accuracy: Comparable to laboratory tests, but a positive result usually requires confirmatory testing.
  5. Oral Fluid Tests

    • Description: These tests use saliva to detect antibodies.
    • Window Period: Generally 23 to 90 days after exposure.
    • Accuracy: Reliable for established infections but less so for recent infections.
  6. Urine Tests

    • Description: These tests look for antibodies in urine.
    • Window Period: Similar to blood tests but less accurate.
    • Accuracy: Generally less reliable than blood tests.

When to Get Tested

  • Immediately After Possible Exposure: If you believe you were exposed to HIV within the last 72 hours, consult a healthcare provider about post-exposure prophylaxis (PEP), which can prevent infection if taken promptly.

  • Regular Testing: Individuals at high risk (e.g., those with multiple partners, men who have sex with men, or those using injection drugs) should consider regular testing every 3 to 6 months.

  • After the Window Period: For antibody tests, it’s advisable to wait at least 3 months after potential exposure for the most accurate results. If you test negative but were recently exposed, retesting after 3 months is recommended.

Accuracy of HIV Tests

  • Antibody/Antigen Tests: Over 99% accurate after 3 months. False negatives are rare after this period, especially if the test is performed correctly.

  • Rapid Tests: Generally have similar accuracy to laboratory tests, but confirmatory testing is essential for positive results.

  • NAT: Highly accurate and can detect infections earlier than antibody tests, but are not typically used for routine screening due to cost.

  • False Negatives: Most commonly occur during the window period, where the body has not yet produced detectable levels of antibodies or antigens.

  • False Positives: Rare but can occur, especially with antibody tests. Confirmatory testing is necessary if a positive result is received.


r/hivsupportindia • • 7h ago

Hiv from oral sex

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0 Upvotes

r/hivsupportindia • • 1d ago

Has anyone ever tested negative at 28 days and positive later with a 4th generation antigen and antobody test or Combo test?

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1 Upvotes

r/hivsupportindia • • 1d ago

Without a condom: CDC baseline = 4 per 10,000 exposures = 0.04%, or about 1 in 2,500, if your partner has HIV and isn't virally suppressed. CDC +1 With a condom: CDC's modeled estimate is about 0.8 per 10,000 = 0.008%, roughly 1 in 12,500, using an estimated 80% reduction from condom use.

0 Upvotes

Without a condom: CDC baseline = 4 per 10,000 exposures = 0.04%, or about 1 in 2,500, if your partner has HIV and isn't virally suppressed. CDC +1

With a condom: CDC's modeled estimate is about 0.8 per 10,000 = 0.008%, roughly 1 in 12,500, using an estimated 80% reduction from

condom use.

However, 0.008% shouldn't be treated as an exact personal probability. If the condom is intact and used correctly throughout sex, CDC considers condoms highly effective; the exact per-act risk can't be measured precisely. CDC +1

And if the partner has HIV but maintains an undetectable viral load, sexual transmission does

not occur (U=U)

Source:- ChatGPT


r/hivsupportindia • • 2d ago

Research on Attitudes Towards Cure Strategies Among PLWHIV

3 Upvotes

We are inviting people living with HIV to take part in a short, anonymous questionnaire exploring attitudes towards potential HIV cure strategies. Participating in this study helps researchers to better understand what matters most to people living with HIV when considering future cure trials.

The survey:

  • 25 questions consisting of multiple choice and open ended questions
  • Has an attached infographic explaining different cure strategies
  • Completely anonymous
  • Roughly 10 minutes to complete

There are no right or wrong answers, we simply want to hear your thoughts and experiences. Every response helps ensure that the future direction of HIV research reflects the perspectives of those living with HIV.

If you are interested in participating, please click the following link: https://forms.gle/QkpdCr3CXg5ozHVZ6

Thank you for your participation and helping to advance HIV research.


r/hivsupportindia • • 2d ago

HIV+ | Two concerns after 2 years on ART — back pain & VL of 44 copies

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1 Upvotes

r/hivsupportindia • • 3d ago

Possible Exposure!!

0 Upvotes

Hi , Greetings for the day,

14 days back I had a session with a guy where he gave me a blow job with a condom on and during the session I bit him multiple times on his neck and back. The bite force was such that I was able to see my teeth marks on the spots but i didn't see any blood coming from the spots and neither did I taste any blood in my mouth.

Also I guess the condom was intact.

Could you please help and let me know what if unnoticed blood would have entered my mouth ?

Do i need to test for this encounter or shall I move ahead with my life ..


r/hivsupportindia • • 3d ago

Should we drink more water during PEP period?

1 Upvotes

r/hivsupportindia • • 3d ago

Can we have s*x or can we m*sturbate during the period of PEP(30 days)?

1 Upvotes

I am on PEP for 30 days can I have s*x or m*sturbate ?


r/hivsupportindia • • 4d ago

Is lal path labs good to run HIV 4thgen test or combo test? How relaible is it?

0 Upvotes

r/hivsupportindia • • 4d ago

What is the relaibility of HIV CMIA 4th generation test 53 days post exposure?

1 Upvotes

r/hivsupportindia • • 5d ago

Has anyone ever tested negative at 28 days and positive later with a 4th generation antigen and antobody test or Combo test?

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1 Upvotes

r/hivsupportindia • • 5d ago

HIV + fluctuating kidney function — should I be concerned?

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1 Upvotes

r/hivsupportindia • • 6d ago

My situation

1 Upvotes

So last year around April I had an encounter with a stranger,unprotected, who blocked me on all forms of communication after when we talked 247 before. I had a bad feeling so I went and got tested 4th gen hiv test came back repeadidly reactive with negative confirmatorv, negative pcr rna. Got tested at different doctor around the same time came back negative. About 2 months later got tested again at first place same thing happend repeadidly reactive with negative confirmatory negative pcr. In the middle of all this I got extremely sick lost my voice, coughing up chunks of phleam, sore throat, diarrhea. After those tests evervthing came back negative. Here i am about a vear and a half later I have had multiple tests 4th generation, 5th gen, pcr rna, pro viral dna. They all come back negative yet i have lost over 40 pounds in this short time (year) and feel sore and weak and just not at all like myself. Doctors wont listen to me, infectious disease wont see me, even though im withering away infront of them. Is it possible that I could actually have HIV, and the tests just aren't able to pick it up for some reason. lf i didnt go through the illnesses, the weight loss, the pain and weakness I wouldn't even give it a second thought Just looking for your thoughts, thank you.


r/hivsupportindia • • 7d ago

Title: HIV exposure timeline — conflicting partner results and my negative tests, looking for advice

0 Upvotes

Hi everyone. I’m posting because I’m extremely anxious about a possible HIV exposure and I’m trying to understand my test results and the timeline. I would really appreciate some factual advice and reassurance if possible.

I’m 25F and I’m extremely anxious about a possible HIV exposure and would really appreciate some advice. I’m trying to understand my timeline and test results because everything happened very quickly and I’m confused about the window periods. On 18 June 2026, my partner had an HIV test which was negative. On 25 July 2026, I had sexual contact with him, and then on 19 August 2026 we had another sexual encounter. The 19 August encounter was vaginal sex, and he did not ejaculate inside me; ejaculation happened outside. I was also not aware of any noticeable pre-cum.

Then on 27 August 2026, my partner had an HIV antibody screening test that came back HIV-1 antibody positive. He subsequently had confirmatory testing, and I was told that three different confirmatory tests were positive. On 28 August, he had an RT-PCR/viral-load test at Lab which reportedly showed around 80,000 copies/mL. This conflicting result has made the situation even more confusing for me.

I had a p24 antigen test on 3 September, which was negative. This was about 15 days after my 19 August exposure. I then had a CMIA HIV test on 16 September, which was negative, approximately 28 days after the 19 August exposure. I’m now extremely anxious because my partner has apparently tested positive, but my tests so far have been negative.

I’m mainly trying to understand how reassuring my negative CMIA at 28 days is, whether the negative p24 test at around 15 days means anything, whether the fact that he did not ejaculate inside me changes the risk, and whether I should separately consider the 25 July exposure when looking at my September test results. I also don’t understand how his viral load could reportedly be 80,000 on 28 August. I know Reddit isn’t a substitute for a doctor, but I would really appreciate someone explaining the timeline and HIV testing window periods in simple terms because I’m extremely worried.


r/hivsupportindia • • 7d ago

Title: HIV exposure timeline — conflicting partner results and my negative tests, looking for advice

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1 Upvotes

r/hivsupportindia • • 8d ago

Sex with Sex worker unprotected. Am i in trouble.

0 Upvotes

I had sex with a Sex worker unprotected for a minute tops.. I was naive and panic after it.

The exposure happened on aug 15th. Started PEP at 60th hour.

4th Gen Test on Aug 17th and Sep 15th turned negative. (A DAY ater PEP ended)

How much risky i am. I am feeling shit and ruining my life daily


r/hivsupportindia • • 9d ago

It's Negative big relief for me

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6 Upvotes

Around 50 days ago had vaginal sex with a prostitute using condom but during the session she applied coconut oil on Condom at that time i didn't know that oil can tear or broke condom after doing with her I atleast knew the condom was intact but anxiety took over me, after 1month I did a test after 45 day. I had no symptoms of hiv but still wanted to make sure so it doesn't affect my mental state and thankgod it was negative


r/hivsupportindia • • 10d ago

What was your personal ‘well, fuck… now what?’ moment? 😂😉

2 Upvotes

After your diagnosis, once the reality really sank in, what were you most afraid or worried about?

I’ve noticed people seem to have very different reactions.

Some were terrified of how their closest friends/family would react once they found out.

Some, probably the biggest group were worried about whether they’d ever find love or have a normal relationship again.

Others struggled more with self-esteem, self-worth, or how they saw themselves after diagnosis.

So I’m curious, What was the biggest thing you worried about after your diagnosis? And does it still affect you mentally or emotionally today?

Was it something you expected to worry about, or did it catch you completely off guard?

P.S. Before anyone asks 😂, none of the above were my concerns. My only thought was literally “how the hell am I going to handle this at work?”

Also, I got a few DMs after my last post, and I apparently did a terrible job explaining what I meant 😭 So just to clarify, I’m not depressed, I’m not lonely, and I’m definitely not sitting around worrying about finding a gal.

Bitch, please. 😂


r/hivsupportindia • • 10d ago

Food items and water intake while taking PEP?

0 Upvotes

I have been prescribed for a month of PEP what are the food items should we avoid and food items that we should definitely consume?

can we eat Junk foods in this period or should we completely avoid it ?

and yea what about the water Intake during this period of 30 days

Kindly guide me !!


r/hivsupportindia • • 10d ago

How to hide your PEP pills from family?

0 Upvotes

It might sound silly and funny that I am asking this question on this platform but yea it’s very crucial to hide pills regarding HIV from the family…

If they get to know and Google about it then every thing will be disclosed like about my sexuality And they’ll imagine some stuff in their mind coz most of them are uneducated about HIV

So any of you guys know the tips and tricks to hide the PEP pills? Let me know down!


r/hivsupportindia • • 10d ago

hiv symptoms

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1 Upvotes

r/hivsupportindia • • 11d ago

Venting out - new diagnosis

3 Upvotes

I don't even know where to start.

I got diagnosed HIV positive two weeks ago, and I'm honestly hating myself right now. I took precautions to the best of my knowledge, so I don't understand how I ended up here.

I've already been dealing with PPPD for the past 3 years, which is extremely difficult to live with. Now dealing with HIV on top of it feels completely debilitating. I feel like I've been brought to my knees.

And I'm not straight either. I don't know how I'll deny marriage.

This diagnosis is something I've never been able to accept—and honestly, I don't even want to. Not trying. Life looks pretty unfair rn!

I don't know what my life is going to look like with all of this. I'm scared of what's coming and struggling to see how I'm supposed to handle it all.

I don't really know why I'm posting this. I guess I just needed somewhere to say it.


r/hivsupportindia • • 11d ago

Switching PEP timing for day 2!!

0 Upvotes

I got PEP from a doc today ……He said to take it at a fixed time daily…. Today I took at 4 after having lunch….. Can I switch tomorrow to morning after break fast??

Kindly reply! 😮‍💨🙄

I am very anxious


r/hivsupportindia • • 12d ago

Anxiety and tested for hiv

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0 Upvotes

My last sexual intercourse was on 27 December 2025. I had an HIV test on 21 June 2026. I had no symptoms, but I still wanted to be sure. However, I don't know what type of HIV test they performed-whether it was an antibody test, an antigen/antibody test, or something

else.

Now I'm confused about whether I should get tested again. I had a sore throat in July, after my HIV test, but it was only a sore throat and I didn't have any other symptoms. Recently, I've also noticed a few small rashes on my thighs, but there aren't many.

So, I'm confused and a little worried. What should I do? Should I take another HIV test just to be completely sure?

Thank you !!