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The use of masks has been part of everyday life since the first days of the pandemic. Unfortunately, EPP has taken up a renewed importance from the highly transmissible Delta variant has become the main strain of the virus in the United States, with local health officials revive mask masks in public places. But cover with just any type of mask does not necessarily mean that you are safe: a new study found that you may need to wear more than one basic fabric or surgical mask to protect you from Covid or you Prevent others spreading.

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The latest research in this area, published in the journalFluid physics July 21, comes from the University of Waterloo to Canada. To test their effectiveness, a team of researchers simulated the breathing of RCR models in a large non-ventilated room while wearingDifferent types of masksIncluding three-layer fabric masks, surgical masks, masks and masks N95, KN95.

The results have found that commonly used tissue masks and basic surgical masks were only capable of filtering exhaled particles "to apparent returns of only 12.4 percent and 9.8 percent, respectively. On the other hand, the results also found that the N95 and KN95 masks saw "substantially more apparent filtration efficiency" of 60 percent and 46 percent, respectively. This led the authors to conclude that the two premium masks of the study "are always the recommended choice to attenuate the interior of transmission of the disease in the air. »

The team estimates that the bad adjustment of mostFabric and surgical masks is responsible for the significant decrease in filtration capabilities. Photographic evidence of the study showed that the spaces between the face and the EPP allow to escape particles in the ambient air, the most commonly redirecting particles on the upper part of the mask on where it touches the nose.

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In the end, the research team concluded that a combination of improved ventilation systems andMore quality masks could go a long way to slow down the propagation of COVID-19. "There is no doubt, it is advantageous to wear everything covers the face, both for protection nearby and remotely in a room,"Serhiy Yarusevych, PhD, Professor of Mechanical Engineering and Mechatronics and the Chief of the Study, said in a statement. "However, there is a very serious difference in the effectiveness of the different masks in the control of aerosols. »

"Many of it may seem common sense," he admits. "There is a reason, for example, that doctors wear masks, they work a lot better N95. The novelty is that we have provided strong figures and rigorous analysis to support this hypothesis. »

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The study comes after some health experts began to suggest highMore quality masks When climbing the Delta variant. During an interview with CNN on August 2,Michael Osterholm, PhD, epidemiologist and director of the University of Minnesota Research and Policy Center for Infectious Diseases, is the case for people toUpgrading cloth masks, Bandanas and alligators that do very little protection against the transmission of the virus.

"We have to talk about better masking," he supported. "We have to talk about N95 respirators, which would do a lot for people who are not yet vaccinated or are not already infected. Protect them, as well as others that could keep infected since vaccinated to breathe the virus. »

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Osterholm was not the first expert atDefender of the EPI upgrade. During an appearance on CBS "Face the nation On July 25,Scott Gottlieb, MD, former Commissioner Food & Drug Administration (FDA), argued that, in addition to focusing on vaccinations,THE RIGHT QUALITY MASKwas necessary to protect against the virus. "I think, however, if you are going to consider wearing a mask, the quality of the mask is important. So, if you can get your hands on A mask or mask KN95 N95 , Who will allow you much more protection, "he said.

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