Over the past two decades, chronic fatigue syndrome has won acceptance by the medical establishment. But much about the disorder -- its causes, its mechanisms in the body -- remain largely unknown.

The argument that CFS is not related to the immune system may now be less stridently asserted. That would be real progress.

Brain fog is a classic part of chronic fatigue syndrome and fibromyalgia, presenting as horrible short-term memory, difficulty with word finding and word substitution, and occasional disorientation.

New research suggests that statins might have a very helpful antiviral effect at high dose, and they may even hold promise as an effective new treatment for CFS and fibromyalgia.

Chronic fatigue syndrome (CFS) is a serious medical condition that can easily be overlooked because it mimics so many other disorders.