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 ...

The droplet impacting on the mask surface is recorded at 20,000 frames per second. These time sequence images of droplet impingement on a single-, double-, and triple-layer masks show the total number ...

An Indian American-led research team at U.C. San Diego reports that if you are going to buy a face mask to protect yourself and others from COVID-19, make sure it’s a three-layered mask. The Abhishek ...

• Three-layer masks have been found to keep you most protected from COVID-19 viral particles. • Recent research found that only about 30% of large respiratory droplets are blocked by single-layer ...