HIV Prevention and Testing > Am I Infected?

Re: 4th Generation Tests

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infoseekerlondon:
Sorry guys but I m missing something, if the 4th generation test is a combination of an antibody and a antigen test, if  it does not detect P24 antigens after say 4 weeks it should be able to detect antibodies at that time no?
In other terms is there a period after antigens disappear when the antibodies have not yet been produced?

Darkfiber:
Seeker

Not necessarily, because as I have stated in this thread, p24 detection is not sensitive enough to exclude infection based solely on P24 detection and a very small minority of people may seroconvert (building antibodies to HIV) between  6 weeks and 3 months.

A retest after the windowperiod sill stays in place.

The same counts for all tests taken within the window period (be it PCR RNA / DNA or P24 or anything else).

Hope this helps

infoseekerlondon:
Allright, thanks a lot Darkfiber

Ann:
info,

I have removed these posts from Fred's thread because asking questions in another person's thread is considered thread hijacking, as stated in the Welcome Thread.

As you already have one current thread going, I'm locking this one so you can return to your original thread.

Thank you for your cooperation.

Ann

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