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Chronic fatigue patients barred from blood donation
Washington Post

The American Red Cross announced Friday that it was barring people with chronic fatigue syndrome from donating blood to reduce the risk of transmitting a virus that has been associated with the disease.

The virus is known as xenotropic murine leukemia virus-related virus, or XMRV. Some studies have found that people with chronic fatigue syndrome are more likely to carry the virus. But it remains far from clear whether the virus causes the disease.

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