I noticed a number of people on here have had possible CFS as a diagnosis. Just read an interesting article in this week’s New Scientist which has found strong evidence for it being a ‘real’ disease, rather than a psychiatric/psychsomatic/functional complaint. Also, it seems that it can be treated effectively with a drug called Rituximab.
I began to suffer with extreme tiredness 30-years ago when I flew from an altitude of 1500-meters down to seal level too quickly inside an un-pressurised aircraft. I am now firmly of the opinion that CFS is triggered by low air pressures as is depression.
Did you mean 15000 metres, surely there isn’t much difference over 1500 metres and it wouldn’t need to be pressurised?