If you only have a single-layer or loose-fitting mask, it may be smart to wear two at once. To double up, wear one cloth mask over another, or wear a cloth mask over a surgical mask. Experts have long ...

Add Yahoo as a preferred source to see more of our stories on Google. Mordkin says that with a good quality mask that has multiple layers (or when you’re double masking), filters aren’t entirely ...

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Dr. Anthony Fauci adjusting his face mask during a Senate Health, Education, Labor and Pensions Committee hearing on June 30. Credit: Al Drago/Pool via REUTERS Homemade cloth masks should have at ...

Correction: An earlier version of this story included a factually inaccurate quote about the restrictiveness of N95 masks. The researcher later said he misspoke, and the story has since been updated ...

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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 ...

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 ...