Two years into the COVID-19 pandemic, the public debate on masks is as heated as ever—especially in Philadelphia, which earned national attention for once again requiring masks in indoor public spaces ...

Early in the pandemic, mask-wearing policies were consistently associated with decreased transmission of SARS-CoV-2. At that time, the masks worn were generally made of cloth and often improvised. The ...

Like many other viruses, COVID-19 is transmitted primarily via particles carried in the air. An infected person breathes out particles containing the virus into the air, which can then be inhaled by ...

The U.S. Centers for Disease Control and Prevention is recommending that the general public wear cloth face masks to help decrease everyone’s chances of getting COVID-19. So how does the new ...

NEW YORK -- You better start stocking up on your surgical or N95 or KN95 masks. Studies are emerging that cloth masks are not as effective in preventing the spread of COVID. A study released in ...

When the federal courts reversed the mask mandate imposed by the Centers for Disease Control and Prevention many airlines, public transit systems, and other businesses lifted mask requirements. See: ...

On April 13, the Centers for Disease Control and Prevention (CDC) extended the mask requirement for public transportation through May 3, but a federal judge in Florida ruled against the mask ...

FARGO — Once the highlight of the week for many people during the stay-at-home order, as of Friday, April 3, trips to the grocery store and other errands have gotten a little more mysterious — in the ...

Add Yahoo as a preferred source to see more of our stories on Google. Disposable masks break into micro-sized plastic fibers that can take up to 450 years to decompose. (Photo: Getty Images) Despite ...

A new study examines the efficacy of particle filtration by woven fabric, which consists of fibers twisted together into yarns. There are, therefore, two lengthscales: the diameters of the fiber and ...