Anaphylaxis is a severe and potentially life-threatening allergic reaction that can occur in response to certain allergens, such as food, medications, insect stings, or latex. It is characterized by a rapid onset of symptoms, including hives, swelling, difficulty breathing, and a drop in blood pressure. Anaphylaxis requires immediate medical treatment, typically with epinephrine, to prevent serious complications and death. Researchers in the field of anaphylaxis study the causes, risk factors, prevention, and treatment of this serious allergic reaction in order to improve outcomes for individuals at risk.