There is an inaccurate statement in this article. The authors did not say there is no evidence of an infectious cause in ME/CFS, only that XMRV and pMLV do not cause it. In a Twiv podcast with Dr. Vincent Racaniello, Dr. Lipkin stated that many patients in previous studies have shown polyclonal B-cell activation and that research into the microbiome and biomarkers continues including work at the CII. He stated that the bulk of the funds invested in the study went toward patient selection (specific case definitions (there are many), psychiatric disorders causing fatigue were excluded, patients had an infectious trigger etc,) and sample collection. This leaves sufficient samples for nearly fifty more studies is this rigorously defined population according to Lipkin. The full podcast is available on iTunes or on Dr. Racaniello's blog.