Well, this made me start thinking... In relation to Brigitte Huber's presentation regarding her XMRV study, at the Invest in ME conference... Prof Huber said that she couldn't find any XMRV in her samples, but that she tested positive for very similar viruses... She put these findings down to contamination in her own lab... But I wonder if she was in fact finding other MLV's. After Huber's samples initially all tested negative, when using a highly specific assay based on XMRV taken from prostate cancer cells, she then tested them with another type of test (nested PCR). This gave some positive results. But after doing further studies, she said at the conference: "The final conclusion which we came to is that this was due to a contamination... Some reagent in our lab is contaminated." I don't know what evidence made her come to the conclusion that it was a contaminant... I wonder if it was conclusive evidence.