Testing types

I see a lot of posting on here for DUO test.  I read a post where teak explained what this was but I'm wondering what the standard test used by U.S. Labs/hospitals is.  Do they use Duo tests here?  Thanks.

[Teak]

* Anyone who continues to post excessively, questioning a conclusively negative result or no-risk situation, will be subject to action by MedHelp. Conclusively negative results or a no-risk situation will be based upon the criteria established by MedHelp’s doctors. Action will be taken as follows:
    * After excessive posting, a warning will be issued by MedHelp
    * Continuing to post regarding the negative result / no risk situation will result in a 3 day suspension
    * Continuing to post upon your return will result in a permanent ban.

[piperpilot]

Sorry, I thought this was a very legitimate question that benefit a lot people as I see no answer to it in all the threads I have read. I don't see where I am "questioning a negative result or a no-risk situation

[Teak]

If you believe you have been exposed to HIV and want help to judge your risk, would like advice about HIV testing, or have questions about the effectiveness of condoms or risks associated with specific sexual practices, this is the site for you.

You've been assessed several times and you didn't have an exposure. Now it's time for you to move along.