Prognosis
Homemade Face Masks Work Best With Multiple Layers, Study Finds
- Scientists use high-speed camera to show droplet dispersion
- At least two layers of cloth recommended for thwarting virus
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Homemade face masks should ideally be made from multiple layers of fabric to trap the viral-laden droplets from the nose and mouth associated with the spread of Covid-19, a study found.
Scientists in Australia compared the effectiveness of single and double-layer cloth face coverings with a surgical mask. Using a tailored LED lighting system and high-speed video camera, they showed a single layer reduced the spread of droplets from speaking, but less than a double layer.