Anaphylaxis

Anaphylaxis is a serious and life-threatening allergic reaction.

Source: tatoeba (6608785)

“Anyone who has experienced or witnessed an anaphylaxis reaction knows it can be very stressful deciding when to inject epinephrine to themselves or a child and often delay,” Dr. Jonathan Spergel, chief of the allergy program at Children’s Hospital of Philadelphia, said in a news release from ARS Pharmaceuticals.

Source: wiktionary

He said a bite could send someone into anaphylaxis, which is a narrowing of the airways and lowering of blood pressure, within minutes.

Source: wiktionary

While we wait, she [Maggie Aderin-Pocock] reassures me that she always carries an EpiPen, and says she has recently become an ambassador for the Natasha Allergy Research Foundation, an allergy awareness charity named after teenager Natasha Ednan-Laperousse, who died from anaphylaxis in 2016.

Source: wiktionary