1. What kind of particulate protective mask (sometimes called disposable mask) can be used to help protect against viruses?
The World Health Organization (WHO) and my country's medical management agencies recommend that, in some cases, use N95 approved by NIOSH, European FFP2 or equivalent protection level respirators for respiratory protection of medical personnel who may be exposed to the virus. N95 masks are certified products of the National Institute of Occupational Safety and Health (NIOSH). The protection levels are equivalent to medical protective masks and KN95 protective masks that meet Chinese standards, and FFP2 protective masks that meet European standards. It should also be noted that the virus may also be spread through saliva and mucous membranes, and hand hygiene is equally important.
2. Why can anti-particulate masks be used to filter viruses?
Particulate respirators are designed to reduce the wearer's exposure to suspended particulates in the air. Pathogenic microorganisms in the air (such as pathogenic bacteria or viruses) are also particulate matter, which can be filtered by the particulate filter material, and the efficiency can achieve the same physical characteristics (such as particle size, shape, etc.) of non-microbial particulate matter (such as dust) ,Smoke and fog) at the same level. However, unlike the particulate pollutants that exist in most industrial environments, there is no exposure limit (that is, an acceptable safety level) to pathogenic microorganisms. Therefore, wearing protective masks can help reduce the exposure to pathogenic microorganisms in the air. However, it cannot guarantee that the wearer will never touch, and does not rule out the possibility of exposure, so the possibility of infection and sickness is not ruled out; if the wearer does not pay attention to hand hygiene, protect the eye mucosa or implement other preventive measures, it may also pass Infected in other ways.
3. What is the difference between the certification levels of N95, KN95 and FFP2 masks?
N95 is the certification level of American respirators, certified by the National Institute of Occupational Safety and Health (NIOSH). N95 certified respirators have a filtration efficiency of not less than 95% for non-oily particles, and the words "NIOSH" and "N95" must be marked on the mask;
KN95 is a respirator certification level that complies with China's mandatory standard GB2626-2006. KN95 certified respirators have a filtration efficiency of not less than 95% for non-oily particles, and the words "GB2626-2006 KN95" must be marked on the mask;
FFP2 is a CE certification level for respirators that meets the European EN149 standard. The filtration efficiency of FFP2 certified respirators for oily particulates and non-oily particulates is not less than 94%, and the words "EN 149:2001+A1:2009 FFP2" must be marked on the mask.
All these respirators (protective masks) need to be designed to fit tightly with the face so that air can pass through the filter material of the mask instead of leaking in from the edge of the mask. All certified masks are produced within the prescribed quality standard system.
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