Aversion to Environmental Factors
Puzzle 3 of Agatha Christie Medium Pack
Question is: Aversion to Environmental Factors
and the answer is: ALLERGY
Word Meaning:
ALLERGY — (medicine, immunology, loosely) A disorder of the immune system causing adverse reactions to substances (allergens) not harmful to most and marked by the body's production of histamines and associated with atopy, anaphylaxis, and asthma; any condition of hypersensitivity to a substance.
Definitions from Wiktionary.