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Au Yeung received a similar request some time ago from one of his customers who asked if he could make face masks out of joss paper, but he declined because he was not convinced that viruses exist ...

In this paper we investigate the impact of mask mandates in schools on COVID spread. We use event study and difference-in-differences models that exploit the removal of mask mandates in districts ...

The Mobile Fab Lab is a large van that carries computer science and digital fabrication equipment, such as 3D printers, a laser cutter, and a variety of robots, to schools for one-week residencies ...