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During the COVID-19 pandemic, the mask and respirator market rapidly grew, along with counterfeit respirators. [1] NIOSH, on behalf of the Department of Health and Human Services, filed a trademark application on June 17, 2020, for various 42 CFR 84 trademarks, including the N95, allowing NIOSH to enforce rules on counterfeit masks outside of rules defined in 42 CFR 84.
An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers under 42 CFR 84, effective July 10, 1995.
Pink hard-case P100 particulate filter cartridges make their presence or absence conspicuous at a distance. Elastomeric respirators are examples of air-filtering respirators, in contrast to air-supplying respirators. Air-supplying respirators are usually positive-pressure, so they leak outwards, and thus offer better protection.
On this scale, 1 is a completely ineffective respirator. Some respirator manufacturers, like 3M, complained that DM and DFM respirators with superior filtration, that would normally receive an APF well above 2, were being "held hostage" by poorly-performing respirators. [96]
1.1. The air purifuing respirators (negative pressure; and powered PAPR) - with high efficiency filters (>99.95%); 1.2. The supplied air respirators - with positive pressure demand air supply to the masks; and with continuous flow air supply to the helmets or hoods. 2 The APF for South Korea and RF are not mandatory, but recommended values only.
The N95 respirator mask was developed by 3M and approved in 1972. [114] Due to its ability to filter viral particulates, its use was recommended during the COVID-19 pandemic but supply soon became short. [ 114 ]
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