2024 Yes Assessment of formaldehyde levels in relation to respiratory and allergic symptoms in children from Alba County schools, Romania https://pubmed.ncbi.nlm.nih.gov/31446497/ Neamtiu, Iulia Europe Observational Exposure Students Elementary (K-5) Carbon Dioxide (CO2) Volatile Organic Compounds (VOCs) Respiratory symptoms Vision Headaches Exposure Formaldehyde levels Indoor air quality Respiratory and allergic symptoms School children Formaldehyde levels were measured in Romanian classrooms as part of SINPHONIE. Higher exposure (≥35 μg/m³) was linked to asthma- and allergy-like symptoms, supporting improved ventilation and material choices to protect student health. 2019