Study of Inflammatory and Physiological Profiles of Healthy and Diseased Lung

Inclusion Criteria: * Participant is willing and able to give informed consent for participation in the study * Aged 18 years or above * Patient: known or suspected airway disease * Healthy volunteer: considered to be in good health with no significant comorbidity (immune disorder, cancer etc.) Exclusion Criteria: * Known or suspected current pulmonary tuberculosis, HIV (human immunodeficiency virus), Hepatitis B Virus, Hepatitis C Virus. * Surgery within the preceding 6 weeks * Participants who are pregnant * History of psychiatric, medical, or surgical disorders that in the opinion of the chief investigator may interfere with sample collection, undergo a bronchoscopy, or may compromise study completion or data collection * Alcohol or recreational drug abuse * Diagnosis of immunodeficiency requiring treatment * Unable to provide written informed consent * Unable to read or write English * Be considered, in the opinion of the investigator, to be an unsuitable candidate for the study