From: Diesel exposure suppresses natural killer cell function and resolution of eosinophil inflammation: a randomized controlled trial of exposure in allergic rhinitics
Group
PM
NO
NO2
CO
SO2
Air
N/A
0.00–0.01 ppm
0.00Â ppm
0.00–0.07 ppm
0.001–0.004 ppm
DE
109.3–111.7 μg/m3
0.037–0.47 ppm
0.347–0.476 ppm
0.75–1.03 ppm
0.002–0.007 ppm