id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-344468-ocrhgoba	Chen, V.	When weighing universal precautions, filtration efficiency is not universal	2020-04-24		.txt	text/plain	476	27	50	Most existing studies investigate masks made of cotton, but there are many promising materials that have not been formally tested, ranging from medical textiles like surgical wrap to consumer goods like non-woven polypropylene shopping bags. This innovation was publicized in the media before it was noted that the 99% efficiency of the surgical wrap refers to a measure called the bacterial filtration efficiency (BFE), and thus could not be meaningfully compared with N95 masks that are tested on their ability to remove much smaller particles. Other FDA-recognized filtration tests measure PFE, BFE, and viral filtration efficiency (VFE) using transmission of 0.1 micron polystyrene latex particles, S. Because each method uses different sized particles to test filtration, the significance of different metrics varies greatly and meaningful conclusions cannot be drawn by comparing, say, a standalone BFE to an N95 efficiency.	./cache/cord-344468-ocrhgoba.txt	./txt/cord-344468-ocrhgoba.txt