Scientists identify best material for making homemade masks to prevent Covid-19 spread
(World News Science)

NEW YORK: Scientists have experimented with non-medical grade masks, and found that well-fitted ones made from stitching two layers of quilting cotton fabric are the most effective in stopping the spread of cough and sneeze droplets, whereas bandana-style coverings "had little to no effect." The study, published in the journal Physics of Fluids, used a laser to map out the paths of droplets as they were...