Effects of Nuclear Weapons Tests: Scientific Facts: "Incompetent medics failed to diagnose acute radiation poisoning from internal exposure to the heavy metal nuclide polonium-210, the most deadly radioactive material on earth due to its short half-life of about 140 days (plutonium-239 has a 24,400 years half life so each atom of that emits only one alpha particle per 35,100 years, which is a comparatively low dose rate - the average life for exponential decay is always 1.44 times the half-life)."
Okay, let's try to kill off a couple of idiotic thoughts I'm already seeing around.
First: not spotting Polonium poisoning is not incompetent medical treatment. Just how many polonium poisoning incidents do they think happen in a year? (Hint: not damn many.) In fact, how many radiation sickness incidents show up in hospitals in a year? Compared to other illnesses that present in pretty much the same way --- leukemia, pernicious anemia, various much less exotic toxins.
And no, most hospitals don't check people for radiation on admittance.