title: Ultrafine particles: insidious invaders.
mesh_terms: D000293:Adolescent; D002244:Carbon / Q000009:adverse effects*; D002648:Child; D002675:Child, Preschool; D004739:England / Q000453:epidemiology; D006801:Humans; D007223:Infant; D019570:Inhalation Exposure; D008171:Lung Diseases / Q000453:epidemiology / Q000209:etiology*; D016676:Macrophages, Alveolar / Q000648:ultrastructure; D010316:Particle Size; D001335:Vehicle Emissions / Q000009:adverse effects*
chemical_list: D001335:Vehicle Emissions; D002244:Carbon