Every 3 minutes, someone goes to the emergency room from a food allergy– and every 6 minutes the reaction is potentially fatal anaphylaxis.
In 2008 there were over 50,000 cases of anaphylaxis from food allergies in the United States alone.
Most allergic reactions are from foods thought to be safe, but which were mislabeled or contaminated during processing.
Wikipedia defines anaphylaxis as a serious allergic reaction that comes on very quick and could cause death. One symptom is throat swelling. Others are an itchy rash and low blood pressure.