2. Types of COLD

One of the most common causes of chronic obstructive lung disease is COPD or chronic obstructive pulmonary disease, which includes bronchitis and emphysema. Asthma is another common cause as it narrows the airways; the condition is the leading cause of COLD in children. Cystic fibrosis and bronchiectasis fall under the COLD umbrella, as well.

Chronic obstructive lung disease asthma

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