https://www.cdc.gov/niosh/npptl/topics/respirators/factsheets/respsars.html Can I use a respirator with an exhalation valve? N-95 Respirator with exhalation valveUsually, yes. An exhalation valve reduces excessive dampness and warmth in the mask from exhaled breath. The valve opens to release exhaled breath and closes during inhalation so that inhaled air comes through the filter. Health care workers may wear respirators with exhalation valves unless the patient has a medical condition (such as an open wound) for which a health care worker would normally wear a surgical mask to protect the patient. Similarly, respirators with exhalation valves should not be placed on a patient to contain droplets and prevent spread of infectious particles; surgical masks are adequate for this purpose.
Can I use a respirator with an exhalation valve? N-95 Respirator with exhalation valveUsually, yes. An exhalation valve reduces excessive dampness and warmth in the mask from exhaled breath.
The valve opens to release exhaled breath and closes during inhalation so that inhaled air comes through the filter. Health care workers may wear respirators with exhalation valves unless the patient has a medical condition (such as an open wound) for which a health care worker would normally wear a surgical mask to protect the patient. Similarly, respirators with exhalation valves should not be placed on a patient to contain droplets and prevent spread of infectious particles; surgical masks are adequate for this purpose. romenty 发表于 1/20/2020 3:19:42 PM
Jeffrey D. Smith, Colin C. MacDougall, Jennie Johnstone, Ray A. Copes, Brian Schwartz, Gary E. Garber. Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis. CMAJ, March 2016 DOI: 10.1503/cmaj.150835
Surgical mask 和 n95 都可以。但是不建议带阀门， 上面都说了exhalation valves should not be placed on a patient to contain droplets and prevent spread of infectious particles; 戴口罩本来就是既防止被传染又防止传染给别人，万一已经被传染了自己还不知道，有空气阀的口罩也拦不住你成为传染源。眼睛也要遮挡，带眼镜或者墨镜比不带强，防止有病毒的飞沫溅到眼睛里。
为什么会让取下？
找到了，谢谢mm
建议算下自己在公众场合（机场/高铁站尤其）的暴露时间，决定买几个（出去一趟算一个/每3-4小时算一个），然后普通医用口罩也可以备点，在家的时候如果有外人来什么的，有备无患。
消毒液随身带，在公众场合，没事滴几滴在手上消消毒。
不管别人如何，自己的回去自我安心方案差不多就这样。btw不是专业人士
本地华人快递。
飞机上打算带普通的手术口罩
https://www.amazon.com/Disposable-Hypoallergenic-Breathability-Comfort-Great-Allergies/dp/B078718WVB/ref=sr_1_4?crid=12NEG4ZLYSWSC&keywords=surgical+mask&qid=1579547758&sprefix=Surgi%2Caps%2C170&sr=8-4
别太担心了，有注意有防范不会有事的
从美国回去的飞机上有传染的可能性极小，主要还是人到了国内
请指教，从眼睛传染具体是怎么传的
飞沫传染，能通过眼睛，口鼻传入病菌，戴口罩只能挡住口鼻。
谢谢，原来有阀门的也可以。
这种我买过的，我有鼻炎，平时收衣服吸地带一下挡个灰什么的。是那种一层薄薄的的口罩，不厚。我觉得指望他防病毒不大可能。有需要的我可以拍照给大家看一下。
它写得是surgical mask. 不知是否符合医用标准的？
收到的袋子上印的就是disposable masks. 就是普通诊所医院里免费给来看病的打喷嚏的人带的那种口罩。
surgical可以的，一次带2个
我觉得没必要非n95，普通surgical mask和n95 mask没啥区别。可以参见这篇文章。
Jeffrey D. Smith, Colin C. MacDougall, Jennie Johnstone, Ray A. Copes, Brian Schwartz, Gary E. Garber. Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis. CMAJ, March 2016 DOI: 10.1503/cmaj.150835
https://www.medpagetoday.com/hospitalbasedmedicine/infectioncontrol/81968
保重，不去武汉的话应该还好
那亚洲人应该买regular还是small？
patpat，一切都会好的
黏膜都传啊，你眼睛都是角质层糊着的吗？
同问
如果我是航空公司的，会要求或允许空服在特定航班戴口罩
我戴regular, 我们医院好像就一种尺寸，没人抱怨，我们医院亚洲人很多
还有亚洲人身体小，但是脸一点也不小！！！
昨天发的时候价格12刀，现在33刀了。
已经断货了
亚洲人是身板小 脸是真的不小。。。