And what's interesting is if you look at the price elasticity, if you look at the correlation between these two, as the anti-retrovirals come down, the number of people you can treat goes radically up. And the Clinton Foundation and WHO believe that they can treat three million people worldwide by 2005 -- two million in sub-Saharan Africa.
最有意思的是，如果你观察价格弹性， 如果你观察两者的相互关系， 抗逆转录病药的价格下降，能够得到治疗 的人数就急剧上升。克林顿基金会和世界卫生组织 相信到2005年他们可以给全世界3百万人提供治疗-- 其中2百万在撒哈拉以南的非洲