Asthma is defined as a respiratory disease caused by narrowing of the air passages that is synonymous with difficulty in breathing, tightness of chest, nasal irritation, coughing and wheezing.<unk>  is defined as:
"A disease characterized by variable airflow limitation and/or airway hyper-responsiveness due to causes and conditions attributable to a particular<unk>  environment and not stimuli encountered outside the workplace".
Occupational asthma
Occupational lung disease
Exercise induced asthma
Asthma
Chronic bronchitis
Asbestosis
Sarcoidosis
CMV pneumonitis