Duh. The best prevention is to avoid non-natural sex and to not take drugs with needles.
Why is that so hard for liberals to understand?
Beats me.
Correct on the various dangerous sexual practices, particularly promiscuously engaged in. But taking drugs with needles is not the problem, taking drugs with shared "dirty" needles most certainly is.
Basically AIDS is spread through blood to blood contact, although other bodily fluids can be the 'carrier' from the 'donor' as well. Avoid getting the blood or "other bodily fluids" in contact with your own blood, while it's still in your body, and you'll avoid AIDS. But you can wash your hands till the cows come home, and will still get colds.