FILE - In this July 1, 2014 file photo, former Iowa State University researcher Dong-Pyou Han leaves the federal courthouse in Des Moines, Iowa. Han, who pleaded guilty in February to making false statements about a potential HIV vaccine in research reports, was sentenced Wednesday, July 1, 2015 to 4 and one half years in prison and must repay a federal government agency more than $7 million. (AP Photo/Charlie Neibergall, File)
DES MOINES, Iowa (AP) — A former Iowa State University scientist who altered blood samples to make it appear he had achieved a breakthrough toward a potential vaccine against HIV was sentenced Wednesday to more than 4
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