Can we really save ourselves from catching a cold? Day one back teaching and I’m in a stuffy room full of snuffles, smothered coughs, and startled sneezes. And that’s just the teacher training day. I make a mental note to pick up some echinacea tea on my way home to ward off the inevitable cold I’m going to catch. But my head fills with new deadlines and specification changes and I forget. A week later I’m snuffling with the rest of them. I curse myself for not taking more care to avoid getting ill so early in the term, but would it really have made any difference if I’d bought…