2024 Yes School Children Exposure to Low Indoor Air Quality in Classrooms During COVID-19 Pandemic: Results of a Pilot Study http://www.psychiatria-danubina.com/UserDocsImages/pdf/dnb_vol33_noSuppl%203/dnb_vol33_noSuppl%203_S318.pdf Kulo, Aidą Europe Observational Epidemiological Modeling Elementary (K-5) Temperature Humidity Carbon Dioxide (CO2) Indoor air quality Classrooms Green building certification Health COVID-19 IAQ parameters (PM2.5, CO2, temperature, humidity) were monitored in four elementary schools during COVID-19. Despite restrictions, many values exceeded recommendations in heating season, highlighting the need for improved ventilation and climate control. 2021