What is the best mask for COVID-19? A mechanical engineer explains the science after 2 years of testing masks in his lab

The CDC’s updated mask guidelines say that cloth masks offer the least protection from COVID-19. Differences in the materials masks are made from and the ways they fit are the reason.

Christian L'Orange, Assistant Research Professor of Mechanical Engineering, Colorado State University • conversation
Jan. 25, 2022 • ~8 min

Evidence shows that, yes, masks prevent COVID-19 – and surgical masks are the way to go

Since the coronaviurs first began spreading around the globe, people have debated how effective masks are at preventing COVID-19. A year and a half in, what does the evidence show?

Laura (Layla) H. Kwong, Assistant Professor of Environmental Health Sciences, University of California, Berkeley • conversation
Sept. 22, 2021 • ~8 min

How to make sure you're wearing your mask right

Masks are only effective if you follow certain principles when wearing them.

Joy Pieper, Clinical Assistant Professor of Nursing, Purdue University • conversation
July 23, 2020 • ~5 min

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