This study shows links between Long COVID’s neurological effects, including brain fog and cognitive decline, and brain blood vessel integrity, offering hope for new treatments and diagnostic methods.
https://www.nature.com/articles/s41593-024-01576-9 (open access)
I think the mutations may be for the better, though. First time I got it (2nd shot), I felt like dogshit. Brain fog, sore muscles, extreme fatigue, runny nose, chills, etc. Second time I got it I felt fine except a small amount of brain fog.