ASTM F2101: Evaluating the Bacterial Filtration Efficiency (BFE) of Medical Face Mask Materials, Using a Biological Aerosol of Staphylococcus aureus

Link: https://www.astm.org/Standards/F2101.htm

Modification for viruses based on ASTM F1671. Link: https://www.astm.org/Standards/F1671.htm

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