2020 Yes https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7420173/ Pulimeno, Manuela Europe Exposure Study Modeling Indoor air quality School Students Performance Health COVID-19 The UNESCO Chair on Health Education and Sustainable Development and the Italian Society of Environmental Medicine (SIMA) propose the following recommendations that include useful suggestions to cope with issues related to COVID-19 pandemic: Avoid classroom overcrowding, share information on academic performance and IAQ with teachers, promote personal hygiene, ventilate classrooms, clean classrooms, VOC producing equipment should be moved out of classrooms, avoid materials containing toxic substances, adopt protocol for IAQ monitoring, increase green space, install thermostats in classrooms, avoid cigarette smoking, renovate where possible, annual monitoring of PM2.5, instal high performance filter systems, install air decontamination filters