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

[James89y]

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.

[AnxiousNoMore]

oral, anal or vaginal and was it protected?

[James89y]

Protected anal but im not sure if condom broke and unprotected oral

[AnxiousNoMore]

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.

[RFGUSA]

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.