Like so many people (up to 20% of Western society), I have allergies. Tree pollen, grass pollen, cats, dogs, rabbits, carrots, hazelnuts, walnuts, apples, peaches, cherries, and dust mite feces all make me itch, wheeze, and sneeze. So I keep an eye on new developments in allergy research. In this post, I will discuss interesting new insights in why allergies are on the rise, and how we can benefit from researching the co-evolution of parasites and their hosts (us).