Some of the most common respiratory diseases are :-

Upper Respiratory Tract Infections
Coughs and Acute Bronchitis
Chronic obstructive pulmonary disease (COPD)
Asthma
Pulmonary fibrosis
Tuberculosis
Pulmonary hypertension

Upper Respiratory Tract Infections
Coughs and Acute Bronchitis
Chronic obstructive pulmonary disease (COPD)
Asthma
Pulmonary fibrosis
Tuberculosis
Pulmonary hypertension