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PM2.5 refers to particle size 2.5 microns. N95 is a industrial and NIOSH standard that it will filter 95% of particles at 0.3 microns. Much smaller than PM 2.5. Corona virus is ~ 0.1 micron. (.06-1.2 microns). Published studies have never directly looked at the ability of N95 masks to filter corona but they do filter similar virus particles and in the real world were reasonably effective at protecting healthcare workers.
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Filter Rating:N95/KN95/FFP2 Mask Application:Welding Mask Certification:FDA, CE Color:White Mask Type:Safe-Type Shape:Dust Mask
Jan 22, 2020 · Feb 3, 2020, 4:01 pm. More. N95 masks, which are tighter fitting, are designed to effectively filter airborne particles. Cathay Pacific says cabin crew can wear masks on mainland China
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Some of the least expensive models only offer one or two layers of protection, but these still meet the basic N95 standard. When shopping for the absolute best N95 masks on the market, however, you should consider the number and quality of filtering layers incorporated into the product.
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