Due to increasing air-borne allergens and pollutants,many people in urban areas are suffering from respiratory disorders causing wheezing due to:
- Abenign growth on the mucous lining of the nasal cavity.
- Binflammation of bronchi and bronchioles.
- Cproliferation of fibrous tissues and damage of the alveolar walls.
- Dreduction in the secretion of surfactants by pneumocytes.
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