ME/CFS (the currently accepted name in the US) is a physiological disease. This is beyond dispute, and no longer a debate in the medical and scientific community. At least in the United States.
US CDC: “Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a serious, long-term illness that affects many body systems.”
US National Academy of Medicine: ME/CFS “is a medical — not a psychiatric or psychological — illness.”
New York State Department of Health: ME/CFS is “a multi-system disease associated with neurological, immunological, and energy metabolism impairment.”
Agreed.
This was intended to be a reply to casebash, who was questioning whether ME/CFS was psychological. It was not meant as a comment on the article itself. My apologies for the confusion.