Earlier quoted context omitted.
That's also the linear no threshold model. The risk of dying increases linearly with the number of bullets you load. A different model suggests that very low levels are either benign or even helpful.
> A different model suggests that very low levels are either benign or even helpful. Ah, the classic shoot yourself with small caliber bullets to build up an immunity against the larger caliber ones!
The body is hit by natural radiation all the time and so it has mechanisms for this. Not so much for macroscopic projectiles.
The question is how these mechanisms behave and whether a small amount of radiation stimulates them… and then how much, for how long, etc. It’s a complex model with multiple systems and feedback loops.