I think it is important to point out that the HIV/AIDS research is providing benefits in other areas as well. Hepatitis C for one. There are millions infected with HepC and the treatment protocols are related to those used to treat HIV.
(DB - one for you if you don't have it yet.)
Hep C is primarily spread by sexual contact just as AIDS is. Hep C wasn't a big thing until AIDS got going - gay bath houses and similar promiscuity, and then health care workers getting it from patients.
If a person doesn't want to get AIDS or Hep C, staying monogamously married to one person of the opposite sex and avoid blood of infected people will pretty much do it. I have three friends who got Hep C from transfusions. Who were the original blood donors and how did they get it?
An ounce of prevention is worth a pound of cure.