Sign in

Your life, sourced by science. A publication from Medium about health and wellness.

Face Mask

In Elemental. More on Medium.

Visualizations reveal these substitutes don’t measure up

A laser-illuminated horizontal and vertical cross-section of droplets escaping a face shield 16.6 seconds after a simulated cough. Image: Siddhartha Verma, Manhar Dhanak, John Frankenfield, Florida Atlantic University

Frustrated with the discomfort of face masks, some people have been using face shields, which have been promoted by some health experts to help prevent the spread of Covid-19. Other people are turning to masks with exhalation valves that make breathing out easier. Now, a new study based on a laboratory simulation brings into laser focus how ineffective both alternatives are at containing the coronavirus.

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store