Dr,
I'd be very grateful if I could tack one last question on to this thread, regarding your last point - happy to pay for another one if not... I promise this will be the last.
One of my friends became HIV+ a few years ago, and after a few dodgy episodes (real risks as opposed to above) I felt the need for occasional testing. I only recently moved to Australia from the UK and would like to feel I can get an early test if another matter arises.
In your post
http://www.medhelp.org/posts/HIV-Prevention/HIV-Duo-Test/show/1455591 you suggest the hiv duo test is at least 99% accurate after 4 weeks. As you probably know, the duo is very accessible in the UK, and has assured accuracy beyond 28 days.
I sent an email to the sexual health centre here in Brisbane asking what test they do. The lady who answered was able to confirm that all tests for HIV check for P24 antigen as well as antibodys. However, when asked if they still suggest a 3 month window (as all the websites in Oz still state), she said:
"depending on your history and risks sometimes and HIV test can show a positive result at the 6 week mark but a retest in a further 6 weeks would always be recommended."
I believe she was a nurse and perhaps isn't confident enough in how the test works or wishes to tow the 'company line' (which is understandable). But from what I've read, surely any decent antibody and P24 antigen test - NHS or Australian standard - will give a reliable result >99% accuracy, as you and many others suggest? Would that be a fair presumption?
Many thanks