Abstract: Allergy word come from the word ‘allos’ and ‘eargen’. Meaning of allergy is altered reaction. Allergen is that things which causes allergy. So according to Dr. Dhiraj Nanda ‘Allergy is an altered tissue reaction shown by an allergic patient whenever he comes in contact with the allergens’. Introduction: Allergist defines allergy as a specific … Continue reading Ambrosia in Allergy