absence of evidence of xenotropic murine leukemia virus-related virus infection in persons with chronic fatigue syndrome and healthy controls in the united states.xmrv, a xenotropic murine leukemia virus (mulv)-related virus, was recently identified by pcr testing in 67% of persons with chronic fatigue syndrome (cfs) and in 3.7% of healthy persons from the united states. to investigate the association of xmrv with cfs we tested blood specimens from 51 persons with cfs and 56 healthy persons from the us for evidence of xmrv infection by using serologic and molecular assays. blinded pcr and serologic testing were performed at the us centers for disease cont ...201020594299
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