2024 No Assessment of ultrafine particles in primary schools: Emphasis on different indoor microenvironments https://pubmed.ncbi.nlm.nih.gov/31159138/ Slezakova, Klara Europe Observational Epidemiological Students Elementary (K-5) Ventilation rates Ultrafine particles Indoor air quality children Microenvironments Outdoor air Inhalation dose UFPs were measured across indoor and outdoor microenvironments in 20 Oporto primary schools. Canteens had highest levels; outdoor and non-classroom areas contributed significantly to inhaled doses, urging broader focus beyond classrooms. 2019