Hi Linds, Kim, Taz I found this current article by the modern N-95 mask's electret filtration's inventor of interest, and for you MD's could also be worth a quick skim through! :
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Summary: o The mask has a face-seal, an outer water-proofing layer, an electret charged filtration layer, and a face-contact layer.
o Contact with alcohol ruins the electret.
o A set of masks can also be re-used in rotation, if each is allowed to rest long enough between uses for any pathogens to degrade.
C+