Realistically, in the first world it's gay men who most need to worry about HIV, due both to the greater likelihood of it being transmitted by anal sex and the much greater preexisting incidence among gay men.
"A recent CDC study found that in 2008 one in five (19%) MSM in 21 major US cities were infected with HIV, and nearly half (44%) were unaware of their infection." -- eep
Heterosexual college-town hookups? Likely to give you all sorts of things, but probably not AIDS. But expect to see these quick AIDS tests in West Hollywood and the Castro real soon now.
Well, the first thing to note is that the numbers are for MSM - men seeking men. That includes men who identify as straight, bisexual, or other, but who have sex with other men. You may not consider this much of a distinction, but for people who study this, it changes things significantly.
And for straight men who don't want to have sex with other men, it should still be a concern when over a quarter of new infections are suspected to be due to transmission during heterosexual sex.
http://www.cdc.gov/hiv/topics/msm/index.htm
"A recent CDC study found that in 2008 one in five (19%) MSM in 21 major US cities were infected with HIV, and nearly half (44%) were unaware of their infection." -- eep
Heterosexual college-town hookups? Likely to give you all sorts of things, but probably not AIDS. But expect to see these quick AIDS tests in West Hollywood and the Castro real soon now.