[防疫資訊] 3M報告指出，一段外科口罩未能有效隔絕SARS

sars入飛沬傳染，唔係airborne。手術口罩防到飛沬，ok㗎。

咪9up害人啦
How SARS is spread
SARS is an airborne virus, which means it's spread in a similar way to colds and flu.

The SARS virus is spread in small droplets of saliva coughed or sneezed into the air by an infected person. If someone else breathes in the droplets, they can become infected.

SARS can also be spread indirectly if an infected person touches surfaces such as door handles with unwashed hands. Someone who touches the same surface may also become infected.

The SARS virus may also be spread through an infected person's poo. For example, if they do not wash their hands properly after going to the toilet, they may pass the infection on to others.

Evidence from the SARS pandemic of 2002 to 2003 showed people living with or caring for someone with a known SARS infection were most at risk of developing the infection themselves.

Source:
SARS (severe acute respiratory syndrome). https://www.nhs.uk/conditions/sars/
(NHS,2019)

請google飛沬傳染 vs 空氣傳染。你要做生意你嘅事，不過買口罩可以喺amazon買，根本唔洗揾樓主代購。

係嫁
冇人迫你買
我而家又唔係好似藥房狗咁開天價仲要亂sell野
我搵埋資料同報告比大家
買唔買，買邊款自己考慮

不過amazon收錢果個係美國佬/中國人
呢度係自己人
又話搞黃色經濟圈
外國手足唔係手足呀?

情感勒索

你唔鍾意咪去amazon買
冇人勒索你

搵埋source比大家都要比人屌

但戴N95係要做 fit test確保唔會漏氣架啵

但戴N95係要做 fit test確保唔會漏氣架啵

N95係美國既口罩過濾標準 唔係口罩型號
唔同口罩都有唔同design

第一個comment個pdf都解釋得好清楚喇

雖然係咁過濾唔到，但外科口罩都有險可守，可以防止噴口水
利申：窮撚只能怪正苦差

sorry我啱啱先發現我標題打錯字
[防疫資訊] 3M報告指出，一般外科口罩未能有效隔絕SARS

老實講
高級口罩係just in case買嚟放屋企
萬一touch wood SARS大爆發 都有口罩用
暫時嚟講(因為香港仲未大規模爆發SARS) 所以一般外科口罩係完全夠用
除非你經常係高危地方出沒e.g.醫院,口岸,膠鐵站,機場

炒賣成咁

你除左識quote段野仲識乜?
我講緊你要單純計空氣傳播，我同你計
無論病毒size定aerosol size都細過pm2.5呀
仲未講sars airborne一宜都係講可能，未知
而且係因為有淘大case先會講
咁要24小時戴口罩啦
https://www.nejm.org/doi/full/10.1056/NEJMoa032867

其實n95 同普通外科最大嘅分別係咩

係嫁醫學角度講
冇一樣野係100% prevent到病毒傳播
N95/N100口罩只能比較有效防止感染
In previous letters, I suggested that proper use of an N100 respirator provides the best protection against SARS. The US Centers for Disease Control and Prevention (CDC) recently reported that the SARS virus can be transmitted by fomites and aerosols and that infection can occur via the mucous membranes of the mouth and eyes (the conjunctiva).

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC332692/

而英國NHS指引表示
How is SARS spread?
Respirator type masks should provide protection for healthcare workers against airborne microorganisms. However, they will not necessarily provide a guarantee of protection against SARS. Current information on SARS indicates that the most likely transmission is via respiratory droplets that are inhaled during close contact, through splashes to mucous membranes and/or contamination of hands from touching the patient or patient’s environment. The environment may be contaminated with respiratory secretions or other potentially infectious materials. Spread of the virus by airborne particles has not yet been
ruled out. Therefore precautions to prevent transmission via this route should be taken until more information is available, including the use of the respirator type masks being distributed.

https://www.sehd.scot.nhs.uk/publications/DC20030610RespiratA.pdf

上面有講
What is the difference between a surgical mask and a respirator type mask?
A surgical mask is not thought to provide reliable protection against airborne infection. However, if a respiratory device is not available then these can be worn, fitted closely to the face, as they may provide some protection against airborne and droplet particles. Surgical masks do not tend to seal well to the face and are more suited to preventing droplets being expelled by the wearer, or protecting them from splashes of blood and body fluids.

分別1:外科隔唔到空氣partical
分別2:外科唔夠貼
分別3:外科平好多

想知6001得唔得 如果得嘅得閒都可以試吓

呢層唔知
要做下research
最重要係搵岩filter

Filter運作唔係好似你廚房個篩咁大過X就過唔到，細過X就過唔到咁簡單架

細過 0.1 μm嘅微粒行布朗運動，會係空氣之中周圍撞，通過filter時好容易被捕獲
大過0.1就靠慣性離開氣流撞落filter度，愈大粒愈易離開氣流

所以0.1～0.3 μm嘅微粒最難隔走
口罩嘅過濾級數都係用0.3 μm嘅微粒過濾表現黎評定

專業

利申: 其實我係文科仔，我都係做Literature Review根據醫學界paper既資料去做分析

有錯麻煩指證

吓 可能我問得唔夠清楚？
但你第一頁提供咗戈幾款N95口罩嘅型號
佢地嘅size同形狀都各有唔同
而因為每一個人嘅面型都有差別 所以先需要做fit test確保搵到適合自己配戴嘅N95 mask啵
唔通我以前入行做醫院時佢地要求做fit test搵適合自己戴嘅N95 mask型號係白做？

ON99 搵食死遠啲啦又情感勒索
而家你學人搵資料都錯撚曬啦

P > R > N 你都未分得清啦仲學人教人
P/R/N grading 係講緊對油性particle 嘅resistance
P100 防到嘅 N100 未必filter得曬
但 N100 防到嘅 P100 一定filter到

黃色又點呀？大撚曬？
錯就唔洗屌呀？
淨係見到你呢啲口吻就討厭

仲有，
美國AMAZON係無斷貨，仲免運嚟香港
自己上去睇比較吓
話唔定仲平過搵呢條友買

條友白撞想搵食咋

我無證無據又唔會亂咁話人白撞嘅
我只係用自己做過幾年僅餘嘅少少醫療知識提出疑問啫
（醫管局每隔兩三年都會叫人再去做吓fit test睇吓你駛唔駛轉型號）

伊波拉幾時係由空氣傳播而唔係體液

教錯人都已經夠衰

Fit test 唔識
P / R / N 又未分得清
又話 Amazon 斷貨，事實無斷
仲要揸住黃色經濟圈嚟凶鳩其他巴打
又要大字又要紅色咁

就咁睇呢幾點，我已經覺得呢條友唔OK
同路人又點？
唔通同路人又要賺錢又要老點其他人都要撐？
不了

樓主都幾垃圾下 Amazon 幾時有斷貨,大把直接運到香港啦

我同意呀
我從來都冇講過話唔洗fit test...
我亦都冇講過全民買N95
一直都話根據實際情況同處境去買合適既口罩

如果呢幾款口罩或者價錢唔啱，可以去第二度買都得
或者放低條link

我有啲points可能講得唔清楚，跟住就比人斷章取義捉住嚟屌

日日都有貨，從未斷過