Ah - Either I mis-read the OP, or you were not as clear as you were just there ^^^^^^.
Probably me...
Right - I would say that in terms of what "society" should do to slow down (or reverse) the spread of HIV/AIDS, it's pretty simple.
- Test well.
- Test early.
- Test widely.
- Test for nothing.
- Make HAART free at the point of use to all patients in all countries.
- Make condoms widely available, free, to all sex workers.
- Make selling sex without barrier protection a serious criminal offence (in the US i believe that this is known as a felony?), REGARDLESS of the HIV status of the sex-worker r the client, and REGARDLESS of the local laws allowing/ignoring general sex-working.
All to be funded by a combination of public expenditure, windfall taxes from drug and sex-industry companies, etc. (for example, how about a tax of 90% of the sales of all pornography that encourages unsafe sex?).
All in all, knowing your HIV status is essential to stopping the spread of the disease, as is understanding and avoiding unsafe practices.
[EDIT] Just remembered that I used jargon. HAARRT = Highly Active AntiRetroviral Therapy (the latest anti HIV drugs).