Effects of prolonged, repeated exposure to ozone, sulfuric acid, and their combination in healthy and asthmatic volunteers

To evaluate effects of "acid summer haze" on individuals who exercise extensively outdoors, we exposed 45 adult volunteers (15 normal or atopic, 30 asthmatic) in a chamber to a mixture of 0.12 ppm ozone (O3) and approximately 100 micrograms/m3 of respirable sulfuric acid aerosol (H2SO4). O...

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