Evaluation of Nasal Biomarkers for Objective Assessment of Disease Severity in Respiratory Disorders

This study investigates whether nasal fluid samples — collected via a simple nasal swab — can be used to objectively measure how severe a person's respiratory condition is. It includes both healthy volunteers and people with rhinitis, sinusitis, asthma, or COPD. **You may be eligible if...** - You are 18 or older - You are either a healthy volunteer with no significant nasal or lung problems, OR you have a prior diagnosis of rhinitis, sinusitis, asthma, or COPD **You may NOT be eligible if...** - You are under 18 years old - You are currently pregnant - You have had nasal surgery or a nasal injury in the past 3 months - You have a nasal anatomical issue that would prevent safe sample collection - You have had an adverse reaction to a finger-prick blood test or nasal sampling Talk to your doctor to see if this trial is right for you.