Masks Work — But What Makes Them More Effective? The Latest On Layers, Filters And Particles

The Centers for Disease Control and Prevention has long asked Americans to wear masks in public spaces, but last Friday they advised to wear a mask everywhere outside of your home.

We know that masks work in helping to slow the spread of COVID-19. And a new study at Virginia Tech led by Linsey Marr, the world’s leading expert on aerosol science, details ways we can make masks even more effective. New York Times health writer and author Tara Parker-Pope fleshes out the details in her recent article, “Time to Upgrade Your Mask?”