While some masks may be just as protective as standard surgical masks against COVID-19, new research suggests one type may be making things worse.
Neck fabrics, in particular, can be even worse than not wearing a mask, according to Duke University researchers.
“We noticed that talking through some masks (especially neck fur) seemed to disperse the larger dots into a host of smaller dots, which explains the marked increase in the number of dots relative to no mask in that case, “the researchers wrote in a lengthy study published in Science Advances.
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Since smaller particles are airborne for a longer period than larger droplets, which sink faster, “using such a mask can be counterproductive,”; the researchers said.
Likewise, the study showed that the bandans “did not block the dots at all.”
Researchers at Duke provided a visual study to prove that face masks are effective in reducing point transmissions. After testing 14 masks or alternative masks available, the researchers found that not all masks were effective tools against spreading the virus.
“We confirmed that when people talk, small droplets are expelled, so the disease can be spread by talking, without coughing or sneezing,” said one of the study’s co-authors, Dr. Martin Fischer, “he said.” We can also see that some face covers performed much better than others in blocking expelled particles. “
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The researchers noted that the best face masks were the valveless N95 masks – which are used by front-line healthcare workers – although surgical or polypropylene masks also performed well.
Handmade cotton face coverings also “provided good coverage” and eliminated a “significant amount” of varnish when someone spoke.
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“Wearing a mask is a simple and straightforward way to reduce the spread of COVID-19,” said co-author and Duke doctor Dr. Eric Westman. “About half of the infections are from people who show no symptoms and often do not know they are infected. They can spread the virus unknowingly when they cough, sneeze and just talk.”
In doing so, Westman said people can eliminate up to 99% of points before they reach someone else.
“In the absence of a vaccine or antiviral drug, it is the proven way to protect others as well as yourself,” he added.
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In July, the director of the Centers for Disease Control and Prevention, Dr. Robert Redfield noted that while “we are not vulnerable to COVID-19, the use of face masks is one of the most powerful weapons we need to slow down and stop the spread of the virus – especially when used universally indoors.” a community environment. “