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Question : Define allergy. What are its symptoms? How it can be prevented?

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Solution :Allergy is charaacterised by hypersensitive RESPONSE of the BODY to some foreign substance called allergen.
Common symptoms of an allergic reaction are : RHINITIS (sneezing and running nose), conjunctivitis (itchy, red and watery eyes), an itchy and red RASH, etc.
Preventive measures :
(a) Identifying and avoiding the allergen.
(b) Use of ANTIHISTAMINE drugs to neutralise allergy - causing histamine.


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