My father started suffering from ME/CFS about 20 years ago. Fortunately it is not so severe that he can’t enjoy life, but he had to stop working (and the author

My father started suffering from ME/CFS about 20 years ago. Fortunately it is not so severe that he can’t enjoy life, but he had to stop working (and the authorities didn’t support early retirement because it’s not a well understood condition). I remember my father was initially off work with a virus, and then subsequently was diagnosed with some sort of thyroid condition which required lifelong prescription drugs to treat. But he never fully recovered (complained of constant fatigue, muscle aches in the morning, and a flu-like feeling) and eventually was diagnosed with ME, although there is no test to prove it definitively, whatever it is.