"Over the past three years, more than 70 publications have followed the original report linking CFS to XMRV," she said.
The new report addresses weaknesses of past research, she said. It also "provides a conclusive answer and offers closure. The totality of published evidence indicates clearly that there should be no lingering concerns about XMRV/pMLVs infecting individuals with CFS."
"There can no longer be any ambiguity," said Dr. Jonathan Stoye, head of virology at the MRC National Institute for Medical Research, in London. "There is no remaining evidence linking XMRV or pMLV with [chronic fatigue syndrome/myalgic encephalomyelitis]," he said.
Over the years, researchers have looked at many types of infections to see if they might trigger or cause chronic fatigue syndrome, according to the CDC. Among them are the virus that causes Epstein-Barr infection, human herpes virus, the Ross River virus and others.
Studies on whether changes in a person's immune system might lead to CFS have been mixed. There is no evidence that chronic fatigue syndrome is caused by deficiencies in nutrition, although experts recommend a balanced diet for anyone with the condition.
There is no cure for chronic fatigue syndrome. According to the CDC, treatment is tailored to a person's specific symptoms. The CDC recommends addressing the most disruptive symptoms, such as fatigue, sleep problems and depression or anxiety.
To learn more about chronic fatigue syndrome, visit the U.S. Centers for Disease Control and Prevention.
SOURCES: K. Kimberly McCleary, president and CEO, CFIDS Association of America; Jonathan Stoye, Ph.D., head, virology, MRC National Institute for Medical Research, London; Septe
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