Pulmonary disease may include chronic respiratory disease, restrictive respiratory disease, respiratory tract infections, lung tumours, pleural cavity diseases and pulmonary vascular disease. Acute or chronic respiratory diseases include symptoms such as shortness of breath, cough and cold, wheezing and fast breathing. It can be diagnosed by chest x-ray, pulmonary function test and CT scan. Pulmonary diseases are most common and significant cause for illness and death in world.