(HealthDay)-Face masks are known to help protect against COVID-19 infections, but US health officials said Wednesday that it’s better to tighten the mask.
In a laboratory study, wearing a cloth or medical mask near the face reduced COVID infections by 95%, according to a new report from the US Centers for Disease Control and Prevention.
“These laboratory-based experiments underscore the importance of good fit to maximize overall mask performance,” said a study led by Dr. John Brooks of the CDC’s COVID-19 Emergency Response Team. Is writing.
“There are several easy ways to achieve better mask fit to more effectively delay the spread of COVID-19,” the researchers said.
The CDC team used dummies to test two ways to prevent air leaks from the edges of the mask. Double masking (wearing a cloth mask on top of a medical mask) and tying the mask together and pushing it in. To this end, they tied the ear loops of the medical mask at the edges of the mask and pushed in excess material near the face to flatten it.
Experiments have shown that wearing a mask that fits people can significantly reduce infection.
Some experts are worried that double masking can completely discourage wearing a mask.
George Mason’s infectious disease epidemiologist Saskia Popescu says, “Rather than layering masks to create discomfort, dyspnea, or frustration that may be completely absent, find a high-quality mask that meets the mark. I want to focus on that. ” Virginia Universities Washington post..
David Rothamer, a professor of engineering at the University of Wisconsin-Madison, experimented with mannequin masks in the classroom, studying the best ways to prevent the spread of the virus in college classes.He said Position He is not an advocate of double masking because it consumes more masks and can lead to more air leaks.
“The only reason is [wear two masks] I wish I could be in good physical condition. “
According to CDC researchers, two other ways to improve the fit include using a mask fitter (a fitted plastic frame for the mask) or wearing a nylon cover over the mask.
Unlike the N95 respiratory mask, the cloth mask and surgical or medical mask fit loosely and allow respiratory droplets to escape, the researchers explained. They are not intended to block airborne particles.
By controlling the spread of aerosol droplets, mask experiments have shown that infected individuals are less likely to be infected with COVID and non-infected individuals are less likely to be infected.
The authors of the CDC noted the limitations of their research, including the use of one medical mask and one cloth mask. Nonetheless, they added, “We continue to make innovative efforts to improve the fit of fabrics and medical procedure masks and improve performance, which is noteworthy.”
The report was published in a CDC publication on February 10th. Weekly morbidity and mortality reports..
Linsey Marr, a professor of engineering at Virginia Tech who studied how to maximize mask efficiency, received some advice on how to get the best mask fit.
“You shouldn’t be able to see or feel any kind of open spot on the edge of the mask, especially around the nose, so it’s very important for the metal bridge to fit tightly around the nose. “She said. Position..
“I don’t want to have a gap around my cheeks or chin, but one way to check this is if you feel like air is leaking from the side when you’re breathing? Put it down and see if you feel anything. When you breathe in, you should feel it stick to your face, “Mah added.
Other signs of the leak included cloudy glasses and cold breathing from the sides of the mask when outside, she said.
If the mask fails these tests, Ma should try something else. “People’s faces have so many different shapes that you can find the one that suits your face,” she advised.
President Joe Biden has signed an executive order urging all Americans to wear masks and demanding their use on federal property and planes, trains, and buses. Currently, 36 state governments require people to wear face covers. Position report. Mask orders are also available in the District of Columbia and Puerto Rico. Meanwhile, three states, Iowa, North Dakota, and Mississippi, have lifted these obligations. Position Said.
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Quote: Tight fit masks can reduce COVID infections by 95%, CDC (February 10, 2021) https://medicalxpress.com/news/2021-02-tight-fitting-masks-slash-covid- to 2021 It states that it was acquired on February 10, 2014. Transmission.html
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According to the CDC, a snug-fitting mask can reduce COVID infections by 95%.
Source link According to the CDC, a snug-fitting mask can reduce COVID infections by 95%.