If the Buffalo Bills want to know if any of their players are vaccine injured, it's easy to do so
There is a company, HeartCare Corp, that makes a machine that looks like an EKG, but can detect a wide variety of heart damage, including myocarditis. They can assess their team in a day.
Then what? Place 1/3rd of the team on a disabled list for blood clots and newly discovered heart problems?
Start the Pureblood league just to be safe