Just stop. Very, extremly rarely was this heard of before the clot shot. AND when it did happen you found out the kid had some congenital defect no one knew about. These days they just pretend it is a mystery, nothing medical presented as to the cuase.
No underlying causes, and happens way more frequently now. It is absolutely justified to wonder if the clot shot may have contrubuted!
It is a new phenomenom. I would think 10 cases per year in athletes. It has always been a good story for the MSM to pick up on.