Allergy may be induced by the fertilizing element of flowering plants produced by the male sexual organ. Pollens are fine, powdery, yellowish grains or spores, and sometimes remain in masses. Airborne pollen types are considered to be the major component of allergens. Pollen cause widespread upper respiratory tract and naso-bronchial allergy with manifestations like seasonal rhinitis, hay fever, and various types of bronchial troubles.
Pollen grains of grasses and conifers are considered… Continue