Why are most "national" institutes behind the times?
Stanford found viruses to blame and actually cured people with antivirals.
Over 20 years ago, they also found blood clumping to be the problem. As blood clumps into a rouleaux formation, it can't make it to the small capillaries very well. Numerous things cause clumping like poor GI health, radiation poisoning, and proteins leaking into circulation.
Let me boldface MITOCHONDRIA for everyone and a molecule called OXYGEN.
If oxygen fails to be delivered, how is mitochondria supposed to function?
To add to the first sentence: Physician's aren't mystified by anything, they primarily treat problems with drugs. Researchers that are also physicians may be mystified, but there's too much research out for mystification to continue.
And, there ARE known triggers, including stress and infection.
The cure is obfuscated and treatment of symptoms is still king.