The purpose of the study is to better understand the mechanisms of lung injury from ozone exposure. Subjects will participate in two exposure sessions: filtered air and 0.2 ppm ozone. Subjects will be asked to produce sputum through coughing after each exposure. The samples will be analyzed for macrophage activity.
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Concentrations of M1 and M2 Macrophages in the Sputum 24 Hours After Exposure.
Timeframe: 24 hours after exposure.
Concentrations of M1 and M2 Macrophages in the Sputum 48 Hours After Exposure.
Timeframe: 48 hours after exposure
Concentrations of M1 and M2 Macrophages in the Sputum 72 Hours After Exposure.
Timeframe: 72 hours after exposure.