2021 Yes https://pmc.ncbi.nlm.nih.gov/articles/PMC7946701/ Howard, Evin J. North America Observational Epidemiology Study Students Elementary (K-5) Middle/Jr High (6-8) Dust Moisture/Water quality Fungi Respiratory symptoms Asthma Asthma ERMI Mold Northeast Schools Homes Observational study compared mold levels in 32 northeastern US schools using ERMI index; found links between mold, building features, and asthma prevalence, supporting targeted environmental interventions.