Dude, who even knows.
So yeah, the “long” symptom echo from what I take to be my 4th? 6th? Covid case are almost gone, I only really got 1 night of half-decent undertow out of it :( The impaired sense of motion-in-space was a lot easier to deal with now that raised-arch walking is trained up, if I feel myself making a wrong call and starting to teeter I can just tauten up the muscles between ankle and shin to check it.