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Coronavirus: Scientists evaluate various mask protection, modifications against...

Scientists have assessed the filtering efficiency provided by various types of facemask modifications, and found that masks made of two layers of woven nylon are some of the most effective when fit snug against the wearer’s face.

https://ift.tt/eA8V8J from Hindustan Times - topnews https://ift.tt/2W5wwEf
Scientists have assessed the filtering efficiency provided by various types of facemask modifications, and found that masks made of two layers of woven nylon are some of the most effective when fit snug against the wearer’s face.