Don't worry, 99% rheumatologists and neurologists have never heard of MECFS, and wouldn't know what PEM stands for, so why bother ?! Of course, they don't mention it, and they never read papers. It's not even mentioned at any neurological conferences, just because something is not mentioned doesn't mean it doesn't exist and doesn't happen in Sjogren's too
The vaccine triggered his Sjogren's symptoms (MECFS, SFN) to explode. He likely had it before with a very few to no symptoms, like many cases. I don't know what to do with your "challenge", what level of proof do you need that Sjogren's can cause dysautonomia ?! will I get paid for this? I am not here to educate you on anything, you can google, I replied only because someone asked me to, but it's a waste of time.