Home-made face masks likely need at least 2 layers to curb COVID-19 spread

Home-made face masks likely need at least 2 layers to curb COVID-19 spread
Home-made cloth face masks likely need a minimum of two layers, and preferably three, to prevent the dispersal of viral droplets from the nose and mouth that are associated with the spread of COVID-19, indicates a video case study published online in the journal Thorax.