| With an N95 mask, you are suppose to suck the air throught the filter, but you need strong lungs to do that. Most people will find that they can't breathe properly with this kind of mask. Fall asleep on the train/bus with one on and you might suffocate?! I have used one at a conference hall, and I ended up taking it off every five minutes in order to get some fresh air. I can imagine the dilemma with health care workers -- it is very easy to contaminate the inside of the mask by adjusting it with their hands still dirty. |
6 SARS Cases in Shanghai