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3. Surgical mask - Wikipedia

   en.wikipedia.org/wiki/Surgical_mask

   Collection efficiency of surgical mask filters can range from less than 10% to nearly 90% for different manufacturers’ masks when measured using the test parameters for NIOSH certification. However, a study found that even for surgical masks with "good" filters, 80–100% of subjects failed an OSHA -accepted qualitative fit test , and a ...

4. N95 respirator - Wikipedia

   en.wikipedia.org/wiki/N95_respirator

   If worn properly, a surgical mask is meant to help block large-particle droplets, splashes, sprays, or splatter that may contain viruses and bacteria. Surgical masks may also help reduce exposure of the wearer's saliva and respiratory secretions to others.

5. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   Respirator. White, disposable Standard N95 filtering facepiece respirator. A half-face elastomeric air-purifying respirator. This kind of respirator is reusable, with the filters being replaced periodically. A respirator is a device designed to protect the wearer from inhaling hazardous atmospheres including fumes, vapours, gases and ...

6. Where to Find the Best NIOSH-Approved KN95, N95 and KF94 ...

   www.aol.com/where-best-niosh-approved-kn95...

   Surgical face masks (the pleated disposable three-ply masks used by medical professionals) are still the first line of defense to help stop the spread of the virus, but KN95, N95 and KF94 masks ...

7. FFP standards - Wikipedia

   en.wikipedia.org/wiki/FFP_standards

   FFP standards refer to the filtering half mask classification by EN 149, a European standard of testing and marking requirements for filtering half masks. FFP standard masks (where FFP stands for filtering facepiece) cover the nose, mouth and chin and may have inhalation and/or exhalation valves.

8. NIOSH air filtration rating - Wikipedia

   en.wikipedia.org/wiki/NIOSH_air_filtration_rating

   The NIOSH air filtration rating is the U.S. National Institute for Occupational Safety and Health (NIOSH)'s classification of filtering respirators. The ratings describe the ability of the device to protect the wearer from solid and liquid particulates in the air. The certification and approval process for respiratory protective devices is ...