Patients with chronic obstructive pulmonary disease (COPD) often experience airway obstruction and mucus buildup in the lungs, making breathing difficult. Ventilation and phlegm clearance for patients with chronic obstructive pulmonary disease (COPD) can help control these symptoms.

Seasonal allergies can affect the ability to learn and work with symptoms such as sneezing, runny nose, watery eyes, etc. Especially for people with COPD, the conditions become more serious.