Asthma is a disease affecting the airways that carry air to and from your lungs. Asthma is a chronic disease that affects your airways. Your airways are tubes that carry air in and out of your lungs. When your airways react, they get narrower and your lungs get less air. This can cause wheezing, coughing, chest tightness and trouble breathing, especially early in the morning or at night. Asthma is an incurable illness. However, with good treatment and management there is no reason why a person with asthma cannot live a normal and active life.
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An allergy is an overreaction of the immune system to a substance that's harmless to most people. But in someone with an allergy, the body's immune system treats the substance (called an allergen) as an invader and reacts inappropriately, resulting in symptoms that can be anywhere from annoying to possibly harmful to the person.
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