It could be done. How? By massive use of anti-retrovirals. The key point about the anti-HIV drugs often missed by non-experts is that they drastically reduce the amount of virus in blood and semen and so make HIV-infected people much less infectious. If you get a critical mass of people with HIV with highly suppressed levels of the virus, you can reach a tipping point at which the virus cannot spread. This approach, using drugs we already have, is far more feasible than all the money wasted on the search for a vaccine that will never exist. And cost-effective too. Here's what I regard as a persuasive case by the president-elect of the International AIDS Society. Read it. It makes more sense than many other ideas.