Do Cloth Masks Offer Protection against COVID-19?

1. Cloth Masks

The global shortage of disposable masks pushed people to purchase or make their cloth masks. However, homemade cloth masks varied significantly in coronavirus protection, among which the worst demonstrated 1% of filtration. Masks that consisted of two layers of high-quality "quilter's cotton" with more than 180 threads showed 79% filtration (even higher than filtration of procedural and surgical masks). Batiks and cotton as the outer layer with flannel as the inner layer were also outstanding in the filtration rate of coronavirus. Note that cloth masks should be washed daily to eliminate droplets on the outer surface of the masks.

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