Question: Does XMRV Cause Chronic Fatigue Syndrome?
One study showed that a majority of people with chronic fatigue syndrome were positive for XMRV. Does that mean XMRV causes chronic fatigue syndrome?
Answer:
A single preliminary study in 2009 did show what appeared to be a significant link, but subsequent studies failed to confirm those findings. Some research has suggested the positive results were due to contamination. The XMRV theory has been largely abandoned.
