Allergic reactions are very commonplace. Some people react mildly to certain products or foods. Perhaps they're left with only a rash, or itching and hives. Others have severe reactions, like anaphylaxis, which if left untreated, can lead to death. How do you know if someone is experiencing anaphylaxis? What can cause it? What are EpiPens, and how do they work? That's what this program will teach you.