Avatar universal

Doubt about p24 antigen and window period in HIV 4th generation test.

Hello, i have a doubt concerning the combo test window period. This is because i have read here that the window period is at the 28th day or beyond the exposure. But i have also read that the combo test detects either the p24 antigen of HIV1 that peaks at the 28th day post exposure or detects the antibodies for HIV 1/2 or both. But MY DOUBT is what if antibodies aren't produced yet at the 28th day post exposure?, would a person with HIV2 have a false negative cause the p24 only is for HIV1? I'm really confused about this and i'm sure it might be a silly question but please I need to clarify this. This website is amazing and gives a lot of peace of mind.
2 Responses
Sort by: Helpful Oldest Newest
Avatar universal
oral, anal or vaginal and was it protected?
Helpful - 0
Protected anal but im not sure if condom broke and unprotected oral
The advice here was good. https://www.medhelp.org/posts/HIV-Prevention/Hiv-survival-inside-sealed-or-airtight-bottle-or-bag/show/3020331#post_14328263
Also, if a condom fails it is a large rip down the seam and it hangs in tatters so both people know it. That didn't happen so you are safe.
Avatar universal
You had protected sex. Keep doing that. You were never at risk. Also HIV 2 is only a concern if you're in West Africa. The number of cases elsewhere is far too small for you to worry about.
Helpful - 0
Have an Answer?

You are reading content posted in the HIV Prevention Community

Top HIV Answerers
366749 tn?1544695265
Karachi, Pakistan
370181 tn?1595629445
Arlington, WA
Learn About Top Answerers
Didn't find the answer you were looking for?
Ask a question
Popular Resources
Condoms are the most effective way to prevent HIV and STDs.
PrEP is used by people with high risk to prevent HIV infection.
Can I get HIV from surfaces, like toilet seats?
Can you get HIV from casual contact, like hugging?
Frequency of HIV testing depends on your risk.
Post-exposure prophylaxis (PEP) may help prevent HIV infection.