It need not be dangerous; at least not so dangerous that three students die within such a short period of time because of non-training related health issues.
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The one I know who made it through and survived a helo crash years later in service explained “the only easy day is yesterday” was not just a saying. Compare the physical demands of what these folks have to get through on top of having a “mandated” clot shot. I find this not unlike the many soccer and other sports players dropping all over.
Erik Christiansen’s collapse on the field during EURO 2020 is the most widely known incident of cardiomyopathy from the Covid shots. Thankfully, he has recovered and is back playing again.
Slightly different topic. For those who think top level soccer players aren’t just about the best conditioned athletes in the world, just take a look at their bodies when they take their shirts off.