2018 Yes https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5858299/ Vornanen-Winqvist, Camilla Europe Observational Exposure Study Teachers Staff Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Ventilation rates Temperature Humidity Carbon Dioxide (CO2) Carbon Monoxide (CO) Volatile Organic Compounds (VOCs) Dust Bacteria Fungi Viruses Allergens Respiratory symptoms Hearing Vision Headaches Stress/Anxiety Job satisfaction Ventilation Positive pressure Indoor air quality Mycobiota Indoor air questionnaire Moisture damage After intervention, the concentration of total volatile organic compounds (TVOC) and fine particulate
matter (PM
2.5
) decreased, and occupants’ negative perceptions became more moderate compared to
those for other parts of the building. The indoor mycobiota differed in species composition from the
outdoor mycobiota, and changed remarkably with the intervention, indicating that some species may
have emanated from an indoor source before the intervention.