A comprehensive program would cost $27 billion, but the potential social benefits would be immense: avoidance of more than 28 million new cases of HIV/AIDS by 2010. This makes it the best investment the world could make, reaping social benefits that outweigh the costs by 40 to 1.
优先权最终落到了预防HIV/AID艾滋病问题上。全球的预防艾滋病计划将花费270亿美元，但是却有巨大的潜在社会利益：这项计划将在2010年之前避免2,800万多的新HIV/AIDS艾滋病病例。这使它成为全世界所能做出的最佳投资，其所收获的社会利益是花费的40倍。