Whether you're the leader of a Girl Scouts troop, about to begin all of those outdoor summer activities, or you're a camp counselor, responsible for dozens of kids while embarking on woodland adventures, you'll undoubtedly run into a few runny noses and sore throats. More than likely, these hay fever symptoms will stem from summer allergies, which are very common ailments. In fact, according to the World Health Organization, the sensitization rates for one or more common allergens in school-aged children are reaching between 40 and 50 percent. The high prevalence among kids puts allergy relief at the forefront of summer defenses, so find out how you can be prepared: