We all do it many times a year. Whether it’s because we’ve got a cold, an allergy or our noses are irritated, sneezing is just another way to clear the membranes. They’re annoying, and usually a symptom of general unwellness, but after all, a sneeze is a sneeze, isn’t it? No harm done? That is not always the case. For too many of us, a sneeze (or a cough, heavy