The aim of this proof-of-concept study is to obtain data that will contribute to the development of sensor devices (biosensor and environmental sensor) for patients with lung diseases (e.g. COPD). The study aims to validate our previous results from healthy subjects by joint testing of the biosensor and environmental device in a real-world setting. Healthy subjects and COPD subjects will be exposed to air of a traffic dense urban region ("urban" air) and to filtered indoor air ("clean" air) during activity and rest. Environmental and biomarker sensors will be used to measure several biomarkers and environmental conditions.
