2020 Yes https://onlinelibrary.wiley.com/doi/full/10.1111/ina.12711 Finell, Eerika Europe Observational Exposure Study Students Middle/Jr High (6-8) High School (9-12) Odor Respiratory symptoms Vision Dampness Indoor air quality Indoor environmental problems Multilevel analysis School Symptoms Schools’ observed mold and dampness were directly and significantly related to poor subjective IAQ . In addition, in schools with mold and dampness, students reported significantly more symptoms than in schools without; the higher the prevalence of symptoms at school level, the worse the students’ subjective IAQ. This indirect path was significant In total, schools’ observed mold and dampness and student-reported symptoms explained 52% of the between-school variance in subjective IAQ