Multi-pollutant exposures in an asthmatic cohort

► Exposure monitoring was conducted for a total of 16 non-smoking adults. ► Simultaneous collection of PM2.5 and PM10-2.5 size fractions was performed. ► Passive diffusion badges provided for ozone and nitrogen dioxide collections. ► Median respective personal PM2.5 and PM10-2.5 exposures were 16.5 and 10.1 μg m−3.