Tuesday, May 5, 2020

Pantyhose Over A Facemask

我曾經介紹過口罩防病的事--其實不是保護自己不受感染,而是萬一自己感染無症狀而不知,不成為飛沫傳染他人的人。本文取自Upworthy網站的介紹:Putting pantyhose over of a homemade mask boosts effectiveness up to 50 percent,小妙招提高口罩的效率。

Research out of Northeastern University indicates that adding a nylon layer outside of a homemade mask can boost its effectiveness. According to NPR, the nylon addition increases the masks ability to filter out small particles by creating a tighter seal around the mask. In fact, in some cases, adding the nylon layer made homemade face coverings more effective than medical-grade surgery masks.

The nylon even made surgical medical-grade surgical masks more effective, pushing a standard surgical mask from blocking 75% of small particles to 90%, rendering it nearly as effective as the N95 mask, which blocks 95%.

The effectiveness of cloth masks vary widely, with some masks in the study only blocking 30% of small particles. Using a thicker weave cloth and adding more layers to a mask helps boost its ability to filter, though any face covering is better than nothing.

With improvements of 15% to 50%, however, the nylon trick is worth trying. Fernandez suggests using queen-sized pantyhose to keep the nylon from being uncomfortably tight. Simply cut 8-inch to 10-inch strip of pantyhose leg and place it over your mask so that it overlaps around all the edges.

Though the research has not yet been peer-reviewed, Ben Cowling, an epidemiology professor at the University of Hong Kong who has studied the efficacy of face masks, says that the study and its findings are "important" and "promising."


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