Comment by Ukv

> But fever is not a way to let you know that foreign bodies are being killed off--that's his claim, and it's wrong.

querez's point is that the sentence is meant to be parsed as:

> pain and fever which are the bodies way of <<letting you know something is damaged>> and <<killing off unknown foreign bodies>> respectively

So the claim is that fever is the body's way of killing off unknown foreign bodies, not the body's way of letting you know something is killing off unknown foreign bodies.