Yeah, nearlythree, when we had working digital thermometers, mine never had a fever. Since they've all been dead, and we gave up on replacing them, I think DS1 maybe had a fever once, but it wasn't severe. In fact, he's never really been ill, well, not in any sort of normal way (He was a bit paralysed. Twice. We never found out what it was.).
And DS2 has never really been ill, not ill enough to miss anything, ever, I don't think.