AIDS病毒已经困扰了人们二十多年。目前全球有数十种疫苗处于临床试验阶段，科学家不知道何时能够得到有效的疫苗来阻止病毒的扩散。
Emilio Emini是国际AIDS疫苗促进会的副主席，他将这项研究的过程比做1492年哥伦布探索大西洋的那次伟大航行。
”Until the guy up at the top of the ship yelled, ‘land,land,’ he had no idea where he was. We(scientist) have no idea where we are. For all we know, we are a day away from somebody yelling, ‘land,land.’ Or we may have months to go. ”
毫无疑问，那第一个喊道”陆地，我看到陆地了”的家伙将获得诺贝尔奖。
生命也是一次旅程，我们会无数次地迷失，找不到可以停靠的陆地。或许在峰回路转之后，才是柳暗花明又一村，那种感觉一定棒极了。
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