@aspvenom,
dont know if they are factored into the false neg rate. In american 1/25o has HIV, but if you factor out homo men and IV drug users it goes up to something like 1/700...passing the test and not being homo or an IV drug user gets us to somewhere near 1/5000 chance our partner is infected. Then we need to talk about transmission rates so the chances of getting HIV from someone who passed the test and is not homo or a IV drug user is far less than 1/5000.
Everything in life has risk, thus one is justified so that we can increase the pleasure of sex by getting rid of the condom.
Actually, drug resistant gonorrhea is on a path to be much more of a risk than HIV in sleeping around without condoms.