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Erhöhte Corona-Infektionsgefahr: Gebrauchte Maske riskanter als gar keine?
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Дерматологи предупредили о рисках неправильного ношения маски
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Ученые объяснили, почему медицинскую маску нельзя надевать повторно
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“It is natural to think that wearing a mask, no matter new or old, should always be better than nothing,” the study’s co-author Jinxiang Xi said in a press release. “Our results show that this belief is only true for particles larger than 5 micrometres, but not for fine particles smaller than 2.5 micrometres.”
To come up with their findings, researchers had tracked “behaviour and fates of aerosols passing through the mask” on individuals wearing a surgical mask with pleats.
“We hope public health authorities strengthen the current preventative measures to curb COVID-19 transmission, like choosing a more effective mask, wearing it properly for the highest protection, and avoid using an excessively used or expired surgical mask,” said Xi.
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Wearing a used mask could be more dangerous than not wearing one at all when it comes to warding off COVID-19, a new study has found.
A new three-layer surgical mask is 65 percent efficient in filtering particles in the air but when used, that number drops to 25 percent, according to the study published Tuesday in the Physics of Fluids.
Researchers from the University of Massachusetts Lowell and California Baptist University say that masks slow down airflow, making people more susceptible to breathing in particles and a dirty face mask can’t effectively filter out the tiniest of droplets.