为什么防尘口罩不行呢既然病毒都是纳米级的，那n95的筛子也比病毒大，理论上真遇到病毒也防不了，关键还是看病毒浓度。老百姓平时出门又不去医院戴口罩顶多就是防个飞沫什么的，那防pm2.5的n99,n100的防护效果跟手术口罩有啥区别呢，如果手术口罩能防飞沫，为什么抗pm2.5的n99,n100不能呢
这也是为什么医用和非医用的不同
同样都是N95，医用标准和非医用的filter是不同的
“Masks can filter particles as small as 0.007 microns – 10 times smaller than viruses, and much, much smaller than PM2.5. What’s more, they work surprisingly well, even while people are wearing them. Surgical masks are perform less well cheap but are cheaper and more readily available. Get the latest clean air tips!”
https://smartairfilters.com/en/blog/coronavirus-pollution-masks-n95-surgical-mask/?__cf_chl_jschl_tk__=9b60753eed487fd4154bf9f34fdf65aaac09759d-1586752523-0-AUbRUxSDu4ePYkBzUrkVbTbWkcBFyGqTF9MKn2cYPMHSuvaMCezvDmqKJLk63Yuv6ltAef3e1pjb0z11H2dN23DM74I1qTKEr_r8WSxCdeODIGvynm_rPd42-aFxtW_McGgqtIhBDl1Gt5JBB82tgwMoy1dDPAGBkpthVCtzPIHZO5DY8JaNPp4O-4SHLO5aXm02UoFQ6Pk9Dig-x9ByJfBib3UA3bHWG70WuifypNV1yhNTWPSdDitETqMO-JLAi9yiFxs-AjkrBLf-vWj2tETvYr7sTRO4riGaiOLV9UmYfSEpttFTCC4vZmlAAsPRq8wNLCCS5XZvuEcN4bGg0TMzryim1EOLKl2aUlKiKnfu
Surgical N95 respirators are designed to reduce but cannot eliminate the wearer’s exposure to airborne biological contaminants. They do not eliminate the risk of illness, disease, or death.
Form a tight seal over the mouth and nose.
Require fit-testing and must be adjusted to your face to provide the intended effectiveness of filtering 95 percent of particles with a mass median diameter of 0.3 micrometers.
“Masks can filter particles as small as 0.007 microns – 10 times smaller than viruses, and much, much smaller than PM2.5. What’s more, they work surprisingly well, even while people are wearing them. Surgical masks are perform less well cheap but are cheaper and more readily available. Get the latest clean air tips!”
https://smartairfilters.com/en/blog/coronavirus-pollution-masks-n95-surgical-mask/?__cf_chl_jschl_tk__=9b60753eed487fd4154bf9f34fdf65aaac09759d-1586752523-0-AUbRUxSDu4ePYkBzUrkVbTbWkcBFyGqTF9MKn2cYPMHSuvaMCezvDmqKJLk63Yuv6ltAef3e1pjb0z11H2dN23DM74I1qTKEr_r8WSxCdeODIGvynm_rPd42-aFxtW_McGgqtIhBDl1Gt5JBB82tgwMoy1dDPAGBkpthVCtzPIHZO5DY8JaNPp4O-4SHLO5aXm02UoFQ6Pk9Dig-x9ByJfBib3UA3bHWG70WuifypNV1yhNTWPSdDitETqMO-JLAi9yiFxs-AjkrBLf-vWj2tETvYr7sTRO4riGaiOLV9UmYfSEpttFTCC4vZmlAAsPRq8wNLCCS5XZvuEcN4bGg0TMzryim1EOLKl2aUlKiKnfu
Surgical N95 respirators are designed to reduce but cannot eliminate the wearer’s exposure to airborne biological contaminants. They do not eliminate the risk of illness, disease, or death.
Form a tight seal over the mouth and nose.
Require fit-testing and must be adjusted to your face to provide the intended effectiveness of filtering 95 percent of particles with a mass median diameter of 0.3 micrometers.
Huasing Association 1999 - 2013