Asthma is a chronic disease of the airways of the lungs. It is caused by the inflammation of these airways due to genetic or environmental factors (exposure to air pollution and allergens).Onset of Asthma is more likely due to genetic factors before the age of 12 and more likely due to environmental factors after the age of 12.
Symptoms of asthma include coughing, wheezing, tightness in chest and shortness of breath. These symptoms occur in episodes and may occur few times a day or a week. They

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