Comment by ck2
It is very real and documented in many many many studies after four years now.
AI analysis of all those studies has come up with at least four different kinds.
Plenty of people like you who were deniers who end up getting it for years now, including many doctors themselves.
https://covid19.nih.gov/news-and-stories/researchers-identif...
Classic reaction of incompetent and arrogant doctors: "I don't know what that is so it's fake/in your head/your fault/etc."