Watch this video about anaphylaxis on HowStuffWorks. Anaphylaxis is a severe, life-threatening allergic reaction triggered by exposure to one or more various antigens, including foods, insect stings, drugs, and latex products. Up to 43 million people in the U.S. alone are at risk for anaphylactic episodes. See how the dual-dose TwinJet device can provide back-up medication for severe allergic reactions in this video from MultiVu.