Note the first image says 40x magnification. I’ve also seen a doctor reporting these clots, sitting at a microscope in her office. So those two examples are visual inspection with a low powered microscope (40x magnification is not that much - high school microscopes are likely higher). I don’t know what kind of test that would be medically.
I wonder how many might benefit from low dose aspirin, or melatonin, as both are said to thin blood?
I also wonder if Astaxanthin (supplement-found in pigment of red shellfish) would help - early on I’d seen Spanish researchers saying it can help break down graphene oxide. Anti-oxidents in general might be a good strategy.
those images are at a lot more then 40x