The problem I find with a lot of these studies is they fail to consider other reasons as to why the vaccinated and unvaccinated have different cardiovascular stats. I imagine that unvaccinated people are free-thinkers in some regard and therefore have mental control over their bodies. The unvaccinated are more willing to exercise, eat healthy, live life free from goyslop or degeneracy for one reason or another and therefore are more likely to have healthier hearts, vaccine or not. A lot of people I meet in life I can tell whether or not they've been jabber regardless, simply by their decision making or appearance. These kind of studies/essays are interesting to a point, but miss an important factor in the "vaccinated vs. unvaccinated" debacle; that being the difference in mental fortitude.