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2. NIOSH air filtration rating - Wikipedia

   en.wikipedia.org/wiki/NIOSH_air_filtration_rating

   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.

3. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   The fitting characteristic of a respirator is the ability of the mask to separate a worker's respiratory system from ambient air. This is achieved by tightly pressing the mask flush against the face (without gaps) to ensure an efficient seal on the mask perimeter.

4. Elastomeric respirator - Wikipedia

   en.wikipedia.org/wiki/Elastomeric_respirator

   Elastomeric masks must be individually fit-tested and inspected for full efficacy. [2] They may be somewhat easier to fit than filtering facepiece respirators. Older mask designs were designed only to fit young adult men of average weight and a narrow range of ethnicities; newer ones use updated anthropometry and fit more people. [5]

5. Fake N95 Masks Infect Supply Chain, End Up in Hospitals - AOL

   www.aol.com/fake-n95-masks-infect-supply...

   Millions of fake N95 respirators are contaminating the nation’s supply of protective face masks just as new strains of COVID-19 heighten concerns about spreading the virus. "They have fooled ...

6. 3M fires back at Trump over order to produce more face masks

   www.aol.com/article/finance/2020/04/03/3m-fires...

   The company said it has been producing as many masks as possible for the U.S. “over the last several weeks and months.” 3M fires back at Trump over order to produce more face masks Skip to ...

7. 3M warns against Trump's order to limit face mask exports

   www.aol.com/news/3m-increase-production-face...

   Trump has asked 3M to ramp up imports of the masks to the U.S. from its other global manufacturing facilities, while demanding a pause in the exports of domestically-produced respirators to Canada ...