Masks work!

In Wired, Ferris Jabr reports,

...widespread use of masks is one of the many reasons why China, Japan, South Korea, and Taiwan have controlled outbreaks of coronavirus much more effectively than the US and Europe. “Of course masks work,” sociologist Zeynep Tufekci wrote in a New York Times editorial. “Their use has always been advised as part of the standard response to being around infected people.” Public health expert Shan Soe-Lin and epidemiologist Robert Hecht made a similar argument in the Boston Globe: “We need to change our perception that masks are only for sick people and that it’s weird or shameful to wear one … If more people donned masks it would become a social norm as well as a public health good.” Last week, George Gao, director-general of the Chinese Center for Disease Control and Prevention, said that America and Europe are making a "big mistake" by not telling the public to wear masks during the ongoing pandemic.

It is unequivocally true that masks must be prioritized for health care workers in any country suffering from a shortage of personal protective equipment. But the conflicting claims and guidelines regarding their use raise three questions of the utmost urgency: Do masks work? Should everyone wear them? And if there aren’t enough medical-grade masks for the general public, is it possible to make a viable substitute at home? Decades of scientific research, lessons from past pandemics, and common sense suggest the answer to all of these questions is yes.

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