Australian researchers have compared home-made face masks with medical surgical masks and found at least two layers of fabric are probably needed to curb the spread of COVID-19
Among the scenarios tested, a three-ply surgical mask was best at preventing droplet spread from any respiratory emission, including airborne particles. Researchers found the best way to emulate this was to use a fabric mask with three layers, but two layers were still better than one.
The paper, co-authored by academics including University of NSW Kirby Institute biosecurity program director Raina MacIntyre and researcher Prateek Bahl, said guidelines on home-made cloth masks "should stipulate multiple layers" and there was a need for more evidence "to inform safer cloth mask design".
Worldwide shortages of personal protective equipment including masks have led health authorities to recommend the use of home-made cloth face coverings as an alternative to surgical face masks, including in Victoria where they are sufficient to meet the public health order requirements that began on Thursday.
پاکستان تازہ ترین خبریں, پاکستان عنوانات
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