I know how we get sore throats (i.e. from viral or bacteria infections), which seems to be the only answers that come up when I try to ask this question online; what I'm curious about is the why. We get a cough to try and loosen mucus, we get a fever to allow the body/immune system to work more efficiently, but why do we get a sore throat? What purpose does it serve physiologically, if any? Or, is it a side effect of something else?