theodp writes "'With countless lives depending on their work,' writes Brett Smith, 'it seems unthinkable that AIDS researchers might falsify their work. However, that's just what Iowa State University assistant professor Dong-Pyou Han has admitted to, according to federal documents.' Han resigned from the project in October after admitting to tampering with samples to give the appearance that an experimental vaccine was causing lab animals to build up protections against HIV. According to the NIH, Han apparently spiked rabbit blood with human blood components from people whose bodies had produced antibodies to HIV. 'This positive result was striking, and it caught everybody's attention,' said the NIH. However, researchers at other institutions became suspicious after they were unsuccessful in duplicating the ISU results. The Iowa State AIDS research project had been awarded $19 million in federal grants over the past several years. Han has agreed to be banned from participating in any federally-financed research for three years."