Define the term Allergen
Concise Biology Class IX By H.S. Vishnoi CHAPTER 17-DISEASES:CAUSE AND CONTROL
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Allergies may result from an inappropriate and excessive immune response to common antigens. SUBSTANCES THAT CAUSE ALLERGIES ARE CALLED ALLERGENS.
Example dust , moulds, pollen, certain foods and some medicines(such as penicillin).
Example dust , moulds, pollen, certain foods and some medicines(such as penicillin).
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