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Answer:
1) Ans.
Allergy occurs when a person reacts to substances in the environment that are harmless to most people. These substances are known as allergens and are found in dust mites, pets, pollen, insects, ticks, moulds, foods and some medications. Atopy is the genetic tendency to develop allergic diseases.
2) Ans.
The substances that trigger allergy are called allergen. Examples include pollens, dust mite, molds, danders, and certain foods. People prone to allergies are said to be allergic or atopic. Although allergies can develop at any age, the risk of developing allergies is genetic.
3) Ans.
an illness that affects the eyes, nose and throat and is caused by breathing in the powder (pollen) produced by some plants.
4) Ans.
Seasonal allergies, sometimes called "hay fever" or seasonal allergic rhinitis, are allergy symptoms that happen during certain times of the year, usually when outdoor molds release their spores, and trees, grasses, and weeds release tiny pollen particles into the air to fertilize other plants.
5) Ans.
Perennial allergic rhinitis is a chronic allergic condition that causes nasal congestion and a runny nose and doesn't subside during certain seasons or months of the year. You may feel like you have a permanent cold that won't go away
Explanation:
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1. the damaging immune response of a body to a certain substance due to hypersensitivity is called allergy ex-rashes , dust mites etc.
2.it is a type of antigen that produces an abnormally virgourous immune response in which a immune system fights off a preceived threat that would otherwise be harm to the body. ex-drug and food allergies
3.hay fever is common name for pollen allergy typically when it comes in contact with nose,throat,mouth and eyes.
symptoms are running nose and itchy eyes.
4.seasonal allergy sometimes called hay fever or season allergic rhinthis that happens during certain times of year.
ex-cold and itchy skin.
5.this allergy are often reactions related to house dust
ex-fungal spores and fibers of fabric