An anonymous reader writes with news that researchers from the University of Western Ontario have been given approval from the U.S. Food and Drug Administration to begin testing an HIV vaccine in humans. From the article: "The vaccine is the first based on a genetically modified killed whole virus, [researchers said.] ... a clinical trial on 40 HIV-positive volunteers will begin next month. That phase will last a year, after which 600 HIV-negative volunteers will see how the vaccine impacts their immune systems. A final phase, which will take about three years, will involve about 6,000 HIV-negative volunteers."