Screen Shot 2020-04-12 at 06.45.29.pngAmid a shortage of medical-grade face masks, such as surgical masks (loose-fitting, disposable masks that block large droplets but don’t filter small particles) and N95 respirators (tight-fitting face coverings that filter out small particles), the U.S. federal government recently changed its recommendations, suggesting now that all residents wear homemade facial coverings when they have to go out…..more