Fig. 4From: Short-term exposure to ambient fine particulate pollution aggravates ventilator-associated pneumonia in pediatric intensive care patients undergoing cardiovascular surgeriesContour plots showing the adjusted effect of PM2.5 (a), SO2 (b) and O3 (c) on the RR of VAP on different lag days. Notes: RR: relative risk; VAP: ventilator-associated pneumoniaBack to article page