A virus called XMRV was linked to chronic fatigue syndrome in a study published in Science in 2009. Now that paper has been withdrawn. David Schumick and Joseph Pangrace/Cleveland Clinic Center for Medical Art & Photography hide caption toggle caption David Schumick and Joseph Pangrace/Cleveland Clinic Center for Medical Art & Photography Shots - Health News Journal Retracts Key Study Linking Virus To Chronic Fatigue Syndrome December 22, 2011 The journal Science has withdrawn a study from 2009 that suggested an obscure virus causes chronic fatigue syndrome. The findings raised patients' hopes for effective treatments. But scientists who raced to confirm the viral link failed to do so.