A new study suggests that some masks are indeed better than others. And in fact, one style of face covering may actually be counterproductive
Obviously, it’s the N95. Photo: Gregi69/Getty Images/iStockphoto We’re committed to keeping our readers informed.
The early warnings that the general public should not wear masks were intended, at least according to Dr. Anthony Fauci — the nation’s leading infectious-disease specialist and the primary face of our coronavirus response — to dissuade us from buying up all the masks while essential workers and hospital staff faced a dire shortage.
Some early research suggested that certain materials were more effective than others at limiting particle flow. A study published in April posited that cotton masks may even be on par with surgical masks. Even bandanas were offered up as workable, in a pinch; whatever could cover the nose and mouth. Which masks are the worst masks? According to this study, knitted masks may not do as much as some other commercially available styles, which makes intuitive sense, as a loose weave is going to be a porous barrier. N95 masks with valves, somewhat surprisingly, did not perform well: While they successfully blocked particles from coming in, they did little to impede the wearer’s droplets from escaping into the air.
“It’s not the case that any mask is better than nothing,” Warren said. “There are some masks that actually hurt rather than do good.”
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