Alergic to Sleep Deprevation?

Well, that's what I call it. It seems that whenever I get less sleep than my body wants (not so much now-days, but if it's consistent enough...), inevitably I get sick. Or at least a sore throat, which is what is plaguing me right now. It's small and going away, but still. Rather annoying if I do say so. Thankfully it never lasts long.