Stop it. What didn't you understand. If they're susceptible to blood clots. How are they testing them? That was prior to COVID. Blood work and piss testing is mainly toxicology. But they do breathing tests, heart tests, etc. These are international and commercial pilots. They get random toxicology tests, simply asked to submit urine and blood. Meanwhile if they have problems they go to a doctor right. Normally their health is covered by the airlines. It's on file.

No that isn't every pilot. But it's the main ones and also most military. You get a few charter and privately owned facilities in places where there aren't the same standards. But there are still standards they have to comply with. Where routine health checks are mandatory for licensing.

You're so focused to stir, and I just don't know what it is. This topic is quite ridiculous. Pilots flying around who could keel over like a bad movie. Not today. Regs have tightened up. But the shit here we've seen it with a bunch of people, athletes, etc, it can cause strokes. Not today with almost all aviation.