
Scientists have found viruses similar to the strain that causes Covid-19 can survive on commonly-worn fabrics for up to three days. The study by De Montfort University in Leicester tested a model coronavirus on polyester, polycotton and 100% cotton. The results suggested polyester posed the highest risk. Microbiologist Dr Katie Laird, who led the study, said the materials, commonly used in masks, posed a transmission risk.
The material most commonly used to make surgical masks is polypropylene, either 20 or 25 grams per square meter (gsm) in density. Masks can also be made of polystyrene, polycarbonate, polyethylene or polyester.
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