hiv test confused

i have read about diferent test generations like 3rd and 4th generation , my doubts are:
1-the diference is tha 4th has antigen? or catch early antibodies too than 3rd?
2-there r 4th generation only for antibodies? or all of them r with antigen?
3-there exist the old and new 3rd generation ? what the diference with the window period so?
ty for ur time

[Dr Sean]

Hello,

1-the diference is tha 4th has antigen? yesor catch early antibodies too than 3rd?no
2-there r 4th generation only for antibodies? noor all of them r with antigen?yes
3-there exist the old and new 3rd generation eh? 3rd generation 3rd generation - no difference ? what the diference with the window period so?
ty for ur time you're very welcome

the question about old and new 3rd generation is because in some forum someone post something about the old 3rd generation tests were no so accurate than the new 3rd generation test........

Do you use a 3rd or 4th generation test when using the Duo p24 test?

Thank you

[Dr Sean]

Hello, a DUO = combined antibody/antigen test = a 4th generation test.

best wishes, Sean

Thanks for your reply!

OK just wanted to make sure that if I get tested on the 28th day after my exposure and its negative I can forget all about having HIV and know for definate I dont have any subtype of HIV 1 or 2 and can move on? (I dont have a compromised immune system or anything like that)