Xenotropic murine leukemia virus-related virus prevalence in patients with chronic fatigue syndrome or chronic immunomodulatory conditions.
Henrich, Timothy J, Li, Jonathan Z, Felsenstein, Donna et al.·The Journal of infectious diseases·2010
Researchers tested whether a virus called XMRV was present in people with ME/CFS and other conditions affecting the immune system. They collected samples from 293 patients, including 32 with ME/CFS, and looked for XMRV DNA. They found no evidence of this virus in any of the samples tested.