But I think something is missing here in the discussion of "Long Covid". If anybody knows, I'm curious about what prior research into post-viral syndrome exists for previous colds, flus, and illnesses? Ideally, this research would be pre-2020 so it's not tainted by current biases.
I hypothesize that "Long Covid" symptoms are mostly the kinds of symptoms that have existed for all of human history following bad colds and flus, the only difference now is that society is looking for and fixated on this far more closely. My reason for believing this is my own experience. In past years, I've had bad flus that made me feel like crap and fatigued for months afterward to the point I could barely function. If I was concerned about Long Covid back then, I'm sure I'd have been panicked and making far more of a deal about it than I did back then.