Personal Experience. I clot very easy. (Aggressive Factor 5 Leiden) A few days without a blood thinner means a stoke or other issue. Visual issues always come first so I get warning before major symptoms start.

After having Covid I basically can only miss one pill. Anything more and things go bad quickly.

I hate the side effects, and they make working a challenge, so I had been trying to walk a line of just enough to not cause problems. I have no margin now.

As for vaccine. Well it terrifies me. I can’t up the blood thinners any higher, can’t handle any additional clotting. Of course a second round round of covid could be worse.