Mo raised his hand timidly before speaking in a squeaky voice. "An allergy is when someone's body reacts violently to something... not necessarily dangerous, but when a person who is allergic to something comes into contact with that particular thing their body... sort of goes crazy. It releases chemicals that cause the person to get very ill and sometimes even die," he said. Yeah. He had had this explained to him MILLIONS of times through his life. He had even been urged to keep an epi pen in his pocket at all times, that is how violent HIS body reacted.