Origin: Anc Greek
ανά/ana(=prefix before verbs meaning “upon”. “toward”, “ against”)
Anaphylaxis is opposite to the Greek word προφύλαξις/prophylaxis (=protection)
The term “anaphylaxis” was coined by Nobel prize recipients Portier and Richet ( 1) in 1902, when they described a dog that had tolerated a previous injection of jellyfish toxin but reacted with bronchial spasm, cardiorespiratory arrest and finally death after 14 days later with a smaller toxin dose.(Portier MM, Richet C.R.Soc Biol, 54;170, 1902)
An induced systemic or generalized allergy (overreacting to allergens).