2024 Yes A Case Study of Upper-Room UVGI in Densely-Occupied Elementary Classrooms by Real-Time Fluorescent Bioaerosol Measurements https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5295302/ Su, Chunxiao North America Observational Elementary (K-5) Particulate Matter (PM) Ultraviolet germicidal irradiation School Indoor air quality Real-time detection Fluorescent bioaerosol Real-time bioaerosol monitors tracked airborne particles in elementary classrooms with and without upper-room UVGI. UVGI classrooms showed reduced fine and total bioaerosols, supporting UVGI as a tool to lower exposure in dynamic school settings. 2017