Question

what is an anaphylaxis

Answer 1

A severe, potentially life-threatening allergic reaction.

hope it helps..

Answer 2

Anaphylaxis  is a potentially severe or life-threatening allergic reaction that can occur very quickly—as fast as within a couple of minutes of exposure to the allergen.

It can be triggered by an allergy to a particular food (peanuts or shellfish, for example) , biting or stinging insects (like bees) , medication (penicillin is a common one) , latex (the type of rubber many balloons are made from) or a variety of other allergic triggers.