Any allergen can cause an anaphylactic response, but usually this dangerous scenario is caused by injected or ingested allergens such as foods, drugs, and insect venoms.

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Anaphylaxis is a severe, potentially life-threatening allergic reaction that can occur rapidly after exposure to an allergen. While any allergen has the potential to cause an anaphylactic response, it is most commonly triggered by foods, medications, and insect stings or bites, which are either ingested or injected into the body.

Any Allergen Can Cause an Anaphylactic Response, but Usually This