Panel and cross-sectional studies have shown associations between levels of ambient air PM measured mainly as mass at monitoring stations in the preceding days and changes in prognostic markers for pulmonary and cardiovascular disease, but the results have been inconsistent regarding lung function, blood markers reflecting inflammation (C-reactive protein (CRP), leukocyte counts), cell expression of adhesion molecules and impaired endothelial function [3,9]. The gene discussed is CRP; the disease is cardiovascular disorder.