Ellis is a four-year-old who plans to start attending preschool in the next month. Past medical history reveals that at the age of 2 ½ years,

Ellis is a four-year-old who plans to start attending preschool in the next month. Past medical history reveals that at the age of 2 ½ years, he was given a peanut butter sandwich and immediately complained of severe itching and swelling of the tongue and “tingling lips.” He was seen by his pediatrician, and after testing was diagnosed with a peanut allergy. During his routine well-child visit in preparation for beginning school, his mother shares her fear with the nurse that he may have another allergic reaction when he is away from home at school. She