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Video compares droplet sprays when wearing different masks — and no mask at all

Researchers compared the sprays of droplets we spew out of our mouths when wearing a one-layered cloth mask, two-layered cloth mask, surgical mask, and no mask at all -- while talking, coughing, and sneezing. Mashable sums up the findings succinctly:
The study's big takeaways are: • When talking, wearing even a single-layer mask significantly limits the exhalation of droplets. • For coughing and sneezing, a double-layer mask is much more effective than a single-layer mask. • Generally, the more layers a mask has the better. The researchers suggest "at least three layers" and found surgical masks performed best in this study — though not everyone has access to these masks.
For more details read the published results in Thorax.

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