allergic reaction n.
A local or generalized reaction of an organism to internal or external contact with a specific allergen to which the organism has been previously sensitized.
The teenage schoolgirl died from an allergic reaction to penicillin last June during the botched operation.
Ross needs to go to the hospital after having an allergic reaction, leaving Joey and Chandler to watch Baby Ben.
Though there is nothing especially political about the book, reading it is like experiencing an allergic reaction to modernity.