Comparison of Mask Types Finds Key Differences in Filtration

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95 masks that are well past their expiration date or have been used and re-sterilized are acceptable alternatives to standard new single-use N95 masks, new research indicates. But some masks start off with better filtration efficiency than others.

Personal protective equipment (PPE) and especially N95 respirators — named for their ability to filter 95% or more of tiny 0.3-μm particles — are scarce commodities in the time of COVID-19.

Shortages in PPE and N95 masks have led some providers and health systems to get creative, adopting nonstandard practices such as using expired N95 masks and various decontamination processes to prolong their use. Hospitals are also turning to imported or donated masks that are not approved by the National Institute for Occupational Safety and Health (NIOSH) as a potential replacement for limited NIOSH-approved N95 masks.

But how safe and effective are these alternatives? ( Read the full article on our FB page)�

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