User:Levi999~enwiki/Xand

An acronym for X Associated Neuro-immune Disease; a new theoretical disease model based on infection of a human host with a newly discovered human retrovirus known as [[Media:XMRV]] (xenotropic murine leukemia virus-related virus.

The term is an outgrowth of a recent peer reviewed article in the Journal Science, finding evidence of active XMRV infection in 67% of patients given a diagnosis of Chronic Fatigue Syndrome by treating M.D.'s. For this study, the sickest patients were selected as subjects based on the diagnosing clinician's judgment and a set of Random Forest Algorithms using multiple bio-markers for the patients.

The working theory is that CFS patients infected with XMRV are a distinct subset of the galaxy of CFS/ME patients. Patients in this subset are identifiable by PCR testing for XMRV, and commercial testing for this retrovirus was commenced in November 2009.