2020 No https://www.sciencedirect.com/science/article/abs/pii/S0048969720333908?via%3Dihub Baloch, Ramen Munir Europe Exposure Study Students Ventilation rates Temperature Carbon Dioxide (CO2) Carbon Monoxide (CO) Volatile Organic Compounds (VOCs) Ozone (O3) Radon Indoor air pollution Allergy Volatile organic compounds (VOCs) Sick building syndrome Multi-pollution Thermal parameters Schoolchildren exposed to above or equal median concentration of PM2.5, benzene, limonene, ozone and radon were at significantly higher odds of suffering from upper, lower airways, eye and systemic disorders. Increased odds were also observed for any symptom (sick school syndrome) among schoolchildren exposed to concentrations of limonene and ozone above median values. Furthermore, the risks for upper and lower airways and systemic disorders significantly increased with the VOCs score. Results also showed that increased ventilation rate was significantly associated with decreased odds of suffering from eye and skin disorders whereas similar association was observed between temperature and upper airways symptoms.