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Polypropylene bags – DIY mask

EDITOR’S NOTE: shopping bags made from this material are ubiquitous in Asia and Africa. The article states that ‘data shows that polypropylene bags are worse than surgical masks at capturing virus-sized particles. However, the high breathability of polypropylene bags means they can be layered up to make more effective DIY masks, although they still do not come close to the performance of a surgical mask.’