Face Masks Tested with Desirable Filtering Efficiency ...
Dec 15, 2020·Another model claimed its BFE and PFE to be ≥99%, but the actual measured BFE ranged from 98.1% to 98.6%, and the PFE ranged from 96.15% to 97.32%. ... Face masks with BFE 95% or above should be sufficient for providing protection in community settings. However, other than wearing surgical masks, consumers must not neglect other precautionary ...