Figure 5
![Figure 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1745-6673-4-17/MediaObjects/12995_2008_Article_105_Fig5_HTML.jpg)
Area under the curve/myeloperoxidase (AUC/MPO) activity ratio for asthmatic patients compared to healthy volunteers. The ratio shows an increased inflammation response in cells exposed to PM2.5, in contrast to the decrease that is shown in the control group.