Asthma is a long-lasting (chronic) disease of the lungs and airways (bronchi) that affects 5 people in every 100. In children, this figure is higher and rising.

This tutorial will explain how the lungs work, what happens during an attack and how to avoid asthma triggers.

Asthma is characterised by attacks of breathlessness, tight chest, wheezing and coughing which are caused by the airways becoming narrowed and inflamed. Some people may have these symptoms all of the time and others may be normal between attacks.

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