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Coughing is your body’s way of getting rid of an irritant.
When something irritates your throat or airway, your nervous system sends an alert to your brain. Your brain responds by telling the muscles in your chest and abdomen to contract and expel a burst of air.
A cough is an important defensive reflex that helps protect your body from irritants like mucus, smoke and allergens, such as dust, mould, and pollen.

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