MCQ IN MEDICINE

Detailed explanation-1: -The allergic reactivity which accompanies various infectious diseases is different in certain fundamental principles from the allergic disease associated with hypersensitivity to such agents as pollens, dust, and foods.

Detailed explanation-2: -Allergies are one of the most common chronic diseases. A chronic disease lasts a long time or occurs often. An allergy occurs when the body’s immune system sees a substance as harmful and overreacts to it.