Study Investigates Associations Between Illness-Related Absences and Ventilation in Elementary Schools

In the June 2023 edition of Environmental International, a study compared ventilation rates and Particulate Matter (PM2.5) in schools throughout the Midwestern United States and the impact they had on illness-related absences for students. Researchers found every “1 L/s per person increase in ventilation rate was associated with a 5.59 decrease in days with absences per year.” They also noted “every additional 1 μg/m3 of indoor PM2.5 was associated with a 7.37 increase in days with absences per year.” They concluded there were “reduced absence rates when classroom ventilation is improved” and there are “benefits of reducing indoor inhalable particles.” 

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