Completely anecdotal, but looking back I believe I had very mild “long covid” after my first bout - slight brain fog, slight fatigue, etc - but nothing unmanageable. (Also, I couldn’t be sure they were Covid related - I am, after all, getting older!)
However, after I recovered from my second bout of covid, these lingering symptoms completely cleared up. Like my body had a lightbulb moment “oh this is how I reset”.
So this article really makes sense, and hopefully it’s a step to a cure for all those people still suffering.