I think the thing that happens with the clot shot, is that in some cases, it exacerbates an unknown, pre-existing condition that may never have been a problem left alone.
I know my mom had a heart murmur and her doctor warned her to be careful because she could have a heart attack and die.
In the end, cancer took her and the doctors couldn’t figure out why she hung on so long. They said it was simply her heart that kept her going, not knowing about what this other doctor said from many years ago.
I was diagnosed with a heart murmur by the Army shortly before my discharge. They actually gave me red dog tags which said ‘heart murmur’ on them. I tossed those in the trash within 50 yards of the infirmary. It was a pre military discharge physical. I never had a heart murmur in my life, but I told them of a childhood illness, so they gave me that crap.
Turns out that 10-15 years later I developed a stenotic Aorta. No Military Physician ever checked me for a murmur.