u/RoundMolecule

I just finished reading this today, and having finished it, the question occurred to me: for most of the book, we're given to understand that having Kiln organisms in a human body is fatal over a longer or shorter period of time (example tank, some people who come back from excursions)...

And then we learn it's not inevitable fatal (Rasmussen), and then we have what happens on the long march back to camp. So what makes Rasmussen, the marchers and everyone in camp after the marchers return different from the example tank victims?