Face masks are one of the best methods to protect yourself against COVID-19 infection. However, even after all these months, the kind and efficacy of the mask have been continually questioned.
Initially, it was recommended that masks be used only if one has symptoms or is caring for a coronavirus positive individual. Then, the World Health Organization stated that everyone in a COVID-19-affected region, whether well or ill, should wear a three-layer mask/cover. The mask should have an outside hydrophobic layer, an inner water-absorbing layer, and a filter layer in between.
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A new study, published in the journal Thorax, pointed out that there are several kinds of material that have been suggested for making masks, but there’s little or no evidence of how effective they are.
And in order to determine this, the researchers compared single- and double-layer cotton face masks (with a thread count of 170 per inch) to a three-ply surgical face mask.
The single-layer mask was constructed using a folded cotton T-shirt, while the double-layer mask was constructed using the CDC’s suggested stitching technique.
The three-ply surgical mask was found to be the most effective, although even a single-layer mask decreased droplet distribution.
Additionally, the researchers said in a journal press release that the double-layer mask performed better than a single-layer mask.
Effectiveness may also be affected by other variables, such as the material used, the design and fit of the mask, and how frequently the mask is washed, according to C. Raina MacIntyre of the Kirby Institute at the University of New South Wales and colleagues.
“Guidelines on home-made cloth masks should stipulate multiple layers,” the researchers concluded.
“There is a need for more evidence to inform safer cloth mask design, and countries should ensure adequate manufacturing or procurement of surgical masks.”
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