德尔塔毒株来袭，该戴N95还是KN95口罩？
近日，美国疾病控制和预防中心（Centers for Disease Control and Prevention）再次敦促民众，即使已经注射了新冠疫苗，在某些环境下仍需佩戴口罩。
那么，N95、KN95口罩和医用口罩、布口罩之间有什么区别？相比于后两者，N95和KN95口罩对面部更加贴合。大家都知道，通过在耳圈上打结，可以让医用口罩和布口罩更贴合，但N95的密封性本身就很好。
N95口罩以及一些KN95口罩其实是一种呼吸器，可以过滤掉你吸入的大小颗粒。布口罩则主要是为了防止佩戴者排出呼吸道飞沫。
口罩通常是分层的。N95和一些KN95口罩有五层防护，医用口罩有三个，部分布口罩可能只有一层。
KN95口罩和N95口罩之间又有哪些区别？
由于名字相似，这两款高过滤口罩让消费者困惑不已。N95口罩被认为是高规格的口罩，其紧紧贴在脸上，能相当有效地过滤空气中的颗粒，过滤掉至少95%的非常小的颗粒。
相反，因为不受美国政府部门的监管，KN95口罩未被批准用于医疗场所。美国的KN95口罩大部分是从中国进口。但是，合适的KN95口罩在阻挡病毒方面仍然非常有效，比布口罩和一次性外科口罩更有效。
什么是“NIOSH批准”口罩？要如何确认自己买的口罩确实得到了批准？
自2018年以来，美国国家职业安全与健康研究所（National Institute for Occupational Safety & Health）与美国食品和药物管理局（Food and Drug Administration）合作，批准了N95口罩。相反，KN95口罩未受监管。获得批准的制造商名单会改变，所以即使产品上写着“NIOSH批准”，你也最好将你想买的产品与名单中的制造商进行比较。一些曾经获得批准的公司的批准已经失效，但也不会及时更新营销内容。
该组织的网站上有NIOSH批准的N95口罩的全部列表。
N95口罩还短缺吗？
在疫情开始时，官员们敦促美国民众不要购买N95口罩，因为即使是卫生健康机构也出现了N95口罩荒。许多零售商当时不再向非医务人员出售N95口罩。
现在这种短缺已经过去，消费者可以重新购买N95口罩，尽管可能超出他们的需求。亚马逊等网站已经允许消费者购买口罩以及KN95口罩。（财富中文网）
编译：杨二一
近日，美国疾病控制和预防中心（Centers for Disease Control and Prevention）再次敦促民众，即使已经注射了新冠疫苗，在某些环境下仍需佩戴口罩。
那么，N95、KN95口罩和医用口罩、布口罩之间有什么区别？相比于后两者，N95和KN95口罩对面部更加贴合。大家都知道，通过在耳圈上打结，可以让医用口罩和布口罩更贴合，但N95的密封性本身就很好。
N95口罩以及一些KN95口罩其实是一种呼吸器，可以过滤掉你吸入的大小颗粒。布口罩则主要是为了防止佩戴者排出呼吸道飞沫。
口罩通常是分层的。N95和一些KN95口罩有五层防护，医用口罩有三个，部分布口罩可能只有一层。
KN95口罩和N95口罩之间又有哪些区别？
由于名字相似，这两款高过滤口罩让消费者困惑不已。N95口罩被认为是高规格的口罩，其紧紧贴在脸上，能相当有效地过滤空气中的颗粒，过滤掉至少95%的非常小的颗粒。
相反，因为不受美国政府部门的监管，KN95口罩未被批准用于医疗场所。美国的KN95口罩大部分是从中国进口。但是，合适的KN95口罩在阻挡病毒方面仍然非常有效，比布口罩和一次性外科口罩更有效。
什么是“NIOSH批准”口罩？要如何确认自己买的口罩确实得到了批准？
自2018年以来，美国国家职业安全与健康研究所（National Institute for Occupational Safety & Health）与美国食品和药物管理局（Food and Drug Administration）合作，批准了N95口罩。相反，KN95口罩未受监管。获得批准的制造商名单会改变，所以即使产品上写着“NIOSH批准”，你也最好将你想买的产品与名单中的制造商进行比较。一些曾经获得批准的公司的批准已经失效，但也不会及时更新营销内容。
该组织的网站上有NIOSH批准的N95口罩的全部列表。
N95口罩还短缺吗？
在疫情开始时，官员们敦促美国民众不要购买N95口罩，因为即使是卫生健康机构也出现了N95口罩荒。许多零售商当时不再向非医务人员出售N95口罩。
现在这种短缺已经过去，消费者可以重新购买N95口罩，尽管可能超出他们的需求。亚马逊等网站已经允许消费者购买口罩以及KN95口罩。（财富中文网）
编译：杨二一
Well, it was nice while it lasted, but the Centers for Disease Control and Prevention is about to once again urge people—even those who have been vaccinated against COVID-19—to begin wearing masks again in certain circumstances.
What’s the difference between a N95/KN95 mask and a medical or cloth one?
N95 and KN95 masks offer a much closer fit than cloth masks or disposable medical ones. As we’ve learned, it’s possible to make medical and cloth masks fit better by tying knots in the ear loops, but an N95 will always have a bigger seal.
N95s (and some KN95s) are a type of respirator, filtering out both larger and smaller particles you inhale. Cloth masks, though, are largely meant to prevent the wearer from expelling respiratory droplets.
It often comes down to layers. N95 and some KN95 masks have five layers of protection. A medical mask has three. And some cloth ones only have one.
What’s the difference between KN95 and N95 masks?
With similar names, these two higher-filtration masks have resulted in a lot of consumer confusion. N95 masks are considered the high-bar of face coverings. They fit snugly on the face and are especially effective in filtrating airborne particles, filtering out at least 95% of very small particles.
KN95 masks aren’t approved for use in medical settings, as they’re not regulated by U.S. officials. They’re largely imported from China. But a well-fitted KN95 mask is still extremely effective in stopping the virus, moreso than a cloth or disposable surgical mask.
What is a NIOSH-approved mask—and how can I verify the one I’m buying really is approved?
The National Institute for Occupational Safety & Health, since 2018, has worked with the Food and Drug Administration to approve N95 respirators. (KN95 masks are not regulated.) The list of approved manufacturers changes, so it’s always wise to compare what you’re thinking of buying to the list—even if the sales listing says “NIOSH approved.” Some companies that were once approved no longer are, but they haven’t updated their marketing.
Find the extensive list of NIOSH-approved N95 masks at the organization’s website.
Is there still a shortage of N95 masks?
At the start of the pandemic, officials urged Americans to not buy N95 masks, as there was an insufficient number for even healthc are officials. Many retailers would no longer sell them to non-medical personnel.
That shortage has passed, and consumers can once again purchase N95 masks, though it might be more than they need. Amazon and other sites, however, are once again allowing consumers to buy them (and KN95 masks).
