The disease which causes the alveoli to be destroyed so the lung becomes much more hollow. This is one type of COPD, it is usually caused by tobacco smoke.     chronic bronchitis     bronchopneumonia     emphysema     pulmonary degradation

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Respiratory Infections

Respiratory infections are infectious diseases of the respiratory tract that are mostly caused by bacteria and viruses. They cause infections of the throat, sinuses, airway path, and lungs. Respiratory infections are typically divided into two types: upper tract respiratory infection and lower tract respiratory infection.