Learn how people with allergies avoid hidden everyday allergens and get a sneak peak at the new allergies treatments doctors are preparing for the future.Eating peanut butter, petting a friendly dog, or sniffing a colorful flower are perfectly harmless activities for most people. However, for allergy sufferers, these can all be life-threatening experiences. Readers (Grades 3-5) will find out why some people have allergies and others don't, how allergies are diagnosed and treated, and which substances are the most common allergens.