One of the things that keeps popping up on my wife's feeds is that Covid seems to be giving people auto-immune antibodies. So, the body appears to be continuing to low level attack the circulatory system, organs, etc.

Basically, we're looking at a massive increase in auto-immune diseases in the next couple years, and you're doctor friend should talk to nearby Rheumatologists about one of the biologic drug trials.

Again, based on the buzz from places like creakyjoints.