This thread is interesting. My CFS may have started with shingles. Around the same time I got subacute thyroiditis (large, painful goiter treated with steroids). That was the start of Hashimoto's autoimmune thyroid disease. I'm not sure then what thing caused the CFS but I've suspected the shingles. But this was 22 years ago. There are periods where I feel like some kind of virus "wakes up" in me based on signs and symptoms.
I'm not sure if it can be pursued now?
While this thread is interesting a lot of it is going by me because of brain fog. Can''t comprehend vey technical things anymore.