“Kind of odd that people can walk around with bullets (990,000 ppm?) in them for years and not have that happen.”
I’m still walking around with a fair amount of a bullet in my left leg. Been there for about thirty years. No problem.
Elemental lead is not dangerous: It’s the oxides of lead (and other lead compounds)that are dangerous as the body can easily absorb them.
In this case, the body has to separate it from an amalgam/alloy (at 210 ppm) first. I'm just not seeing the potential to get enough lead exposure from one of these to cause the problems that are being attributed to it.
I guess that is the explanation; I knew it had to do with the specific compound or physical form.