Case study:- Read the given statements and answer the questions that follow :- Some of us are sensitive to some particles in the environment. For example, when you have gone to a new place and suddenly you started sneezing, wheezing for no explained reason and when you went away your symptoms disappeared. The exaggerated response of the immune system to certain antigens present in the environment is called allergy.

Which of the following are allergens?

Pollen, mites . Animal dander, dust. Insect bites and stings (their venom) . All of these .

All of these .

Common allergens include: Animal proteins and animal dander. Dust. Drugs (such as antibiotics or medicines you put on your skin) Foods (such as egg, peanut, milk, nuts, soy, fish, animal meat, and wheat) Fungal spores. Insect and mite feces Insect bites and stings (their venom) Natural rubber latex.