ME is most similar in nature to another neurological illness, Multiple Sclerosis. ... If you hear someone who claims to have had ME and is now functioning at 100% normal again, chances are extremely high they never had ME to begin with.
... That said, anyone who spends any significant amount of time studying the true nature of this illness will see the tremendous amount of damage it does to multiple body systems. It makes sense that this damage would have a shortening effect on most ME patients' lives. For example, Dr. Elizabeth Dowsett says of ME patients, "20% have progressive and frequently undiagnosed degeneration of cardiac muscle which has led to sudden death following exercise."