Class 7 (ICSE) / Science
Chapter 21: Allergy
Allergy, ICSE Class 7, based on Selina Concise Physics/Chemistry/Biology for ICSE Class 7.
Topics
Topic 1
Allergy
An allergy is an overreaction of the immune system to a normally harmless substance, causing symptoms ranging from mild to severe.
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Practice and Revision - Allergy
Let us practise and revise what we learned about allergy. An allergy is an overreaction of the immune system to a normally harmless substanc
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