Using high-speed video and schlieren imaging, a research engineer has created videos that show how air flows through masks with and without exhalation valves. Many people wear masks in public to slow ...

Many people wear masks in public to slow the spread of COVID-19, as recommended by the Centers for Disease Control and Prevention (CDC). However, masks with exhalation valves do not slow the spread of ...

Forbes contributors publish independent expert analyses and insights. I write about the brain and the body but sometimes other things. New videos show how the N95 masks with an exhalation valve ...

Nov. 10 (UPI) --Masks with exhalation valves don't help slow the spread of COVID-19, according to new videos captured using the schlieren imaging system and a technique called light-scattering. Masks ...

Since it's possible to transmit the coronavirus even if you aren't showing symptoms, the CDC recommends covering your face to protect others. You can buy disposable masks, sew your own out of fabric, ...

You might not know it, but the N95 respirator actually has a close cousin. One variation of the mask has an exhalation valve right in front of the mouth. It’s a one-way trip for airflow. When you ...

In some states and major cities, it’s now mandatory to wear a mask in public to prevent the spread of COVID-19. That mask could be anything from a handkerchief to a designer cotton mask to a ...

ATLANTA — There is one mask that's becoming popular online, but medical experts said it does more harm than good. Masks with what's called an exhalation valve promise better comfort than traditional ...