What does spending an additional US$125 billion buy Africa?
First, the additional money buys fewer HIV infections and extra years of life. Over the period 2003 to 2025, there would be 43 million fewer people infected with HIV under the Times of transition scenario than under Traps and legacies. A widespread and unchecked epidemic would persist under the Traps and legacies scenario, even with expenditures that total US$ 70 billion in a quarter century and amount to US$ 4 billion annually by 2025. Under the Times of transition scenario, spending in 2025 will be US$ 11 billion, almost three times the level under Traps and legacies, but with a vast difference in terms of potential outcomes. However, the cost per infection averted under Times of transition averages nearly 50% more than under the Tough choices scenario, due to higher costs in preventing HIV infection in populations that are more difficult to reach. The best buy in terms of greater cost-effectiveness of the proposed interventions can be attributed to the Tough choices scenario, reflec
