Dodd, Roger Y, Hackett, John, Linnen, Jeffrey M et al. · Transfusion · 2012 · DOI
Researchers tested thousands of blood donors and transfusion recipients to see if XMRV (a virus once suspected to be linked to ME/CFS) was present in the blood supply and could be transmitted through blood transfusions. They found no evidence of the virus in any of the donors or recipients tested, suggesting that XMRV does not pose a safety risk to people receiving blood transfusions.
When XMRV was first proposed as potentially associated with ME/CFS in 2009, concerns arose about its blood safety implications. This study provided reassurance to both blood recipients and the transfusion medicine community, though it does not address whether XMRV is actually involved in ME/CFS pathogenesis or whether ME/CFS patients themselves have different XMRV prevalence rates.
This study does not prove that XMRV is unrelated to ME/CFS—it only demonstrates that XMRV is not detectable in routine blood donors and poses no transfusion risk. It does not compare XMRV prevalence specifically in ME/CFS patients versus healthy controls. The study also cannot rule out the possibility of XMRV in very small subpopulations missed by sampling or in populations not represented in blood donor registries.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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