Unfortunately, contrary to popular belief, having it once doesn't guarantee you won't get it again. Also, beware that many people who've had the seemingly minor symptom of loss of the sense of smell have reported as having later developed a bizarre sensory aversion to certain foods. For instance, a lifelong chocolate lover might suddenly find that chocolate smells and tastes like rotten eggs. Or the scent of something normally lovely and fragrant like lavender suddenly smells like rotting meat. There are many, many cases of this happening, so beware.