A study in the journal Science has cast more doubt on the basis for claims that chronic fatigue syndrome is linked to the virus XMRV. Nine laboratories tested blood samples from healthy people and from people with chronic fatigue syndrome previously reported to have signs of infection from murine leukemia viruses. Only two labs were able to detect signs of the virus in any sample, but additional testing did not confirm those two labs' results. "There does not seem to be any evidence of an association of XMRV with chronic fatigue syndrome," said Dr. Harvey Klein, who has monitored the research for AABB.
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