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The most common cause of peanut allergy is eating peanuts or peanut-containing foods. Sometimes direct skin contact with peanuts can trigger an allergic reaction. Cross-contact. This is the unintended introduction of peanuts into a product. It's generally the result of a food being exposed to peanuts during processing or handling. Inhalation.
In the first of these surveys conducted in 1999, the prevalence of peanut allergy was estimated at 0.6% while the prevalence of tree nut allergies was estimated at 0 .5% (1) . Several years later, a similar survey on the prevalence of seafood allergies led to estimates of 1.9% with shrimp (crustacean shellfish) allergy and 0.4% with fish allergy (2).