What type of allergy makes the most childhood anaphylactic reactions?

Food allergies. Food allergens are the most common causes of childhood anaphylactic reactions with peanuts, tree nuts, fish, shellfish, cow's milk, soy and eggs being among the most common. Stinging insects, medications and latex rubber are also among the more common causes.
Peanuts. Food is the most common trigger of anaphylaxis in children, especially peanuts and tree nuts. Other foods include shellfish, fish, milk, eggs, soy and sesame.