2024 Yes Effect of Face Mask on Lowering COVID-19 Incidence in School Settings: A Systematic Review https://doi.org/10.1111/josh.13483 Viera, Luka Multiple Countries Review Students Teachers Staff Kindergarten Elementary (K-5) Middle/Jr High (6-8) High School (9-12 Viruses COVID-19 COVID-19 Mask mandate School children Researchers reviewed 14 studies on school mask use and COVID-19 in five countries. Ten found reduced incidence, while others showed no or negative effects. Findings highlight methodological gaps and the need for stronger study designs. 2024