Fig. 4
From: Impact of outdoor air pollution on the incidence of pertussis in China: a time-series study
3-D plot of relative risk of pertussis onset (RR) versus lag time for exposure to four air pollutants. A-D Four air pollutants associated with (NO2, O3, PM2.5 and SO2) pertussis incidence from 2013 to 2018. The X-axis represents the exposure concentration of the four pollutants,the Y-axis represents the lag period from 0 to 2 months, the Z-axis represents the relative risk of each variable (NO2, O3, PM2.5 and SO2)