Thanks for the information.

Great!

Hi!

Works performed in the 1990' about the efficiency of masks in work conditions:

Article Field study of subjective assessment of negative pressure ha...

Article Measurements of workplace protection factors of six negative...

Article Assessment of the performance of respirators in the workplace

Other references available in French

Merci beaucoup pour cette contribution. Nous travaillerons sur ces matériaux et verrons la possibilité de les intégrer dans la version 3 du rapport.

Great work. It will be helpful.

Thank you Sharmin. Is a work in progress. I will put here future developments. This is V1.0, the V2.2 is already done but under peer review and the V3.0 is with one week work.

Henrique

From what I hear it maybe why, if they are correct, the Japanese mortality rates are so low.

Thanks!

Actually the use of mask is some how a preventive measure as it will in reducing the rate of transmission. As we all find out that the virus can be transmitted through droplets either through coughing, sneezing or droplets from the mouth. So using the mask can help prevent the droplets when someone having Corona Virus sneezes or coughs when taking.

It is more advisable when in the public to use mask as you cannot tell who is infected.

The only thing is that the long use of mask at a particular moment will make someone to be fatigue because of less oxygen being taken.

Great! Thanks

From my experiences in Hong Kong and Macao region, the wearing of face mask can help to raise the health awareness in combating the Corona Virus as well as to slowing down the spread of Corona Virus. We have learned the lesson from the SARS. Nevertheless, health education in reminding the public about the good and bad practice of wearing face masks in wise, feasible and practical manner should be widely publicized. This is just one of the strategies to combat Corona Virus. Other effective measures such as hand wash, social distancing, personal health monitoring, environmental controls should not be neglected. Add oil.

Thank you very much

Actually the use of MASK is a real preventive strategy in preventing corona virus but many people in my country experienced difficulty in using the MASK. But measures put in place to ensure that MASK are being used especially in public places such as offices, etc. Maintaining social distance is an other strategy that will help to reduce the spread of Corona virus

Dear Lamin,

Thank you for your answer.

Is very interesting that you said that people has difficulty in using the masks. Why? Could you explain deeply? We have lot of interest in this kind of issues.

HL

well in Pakistan, still many people are not using masks. There is a significant population that still does not believe in the reality of this pandemic. Some of those who are using masks are not wearing/using them properly.

Recently, the government has started to impose fines (through traffic police and other authorities) for not using mask in public places and in vehicles...

Dear Syed,

Thank you very much for your important sharing of knowledge. Will be noted.

Regards

HL

There was a delay in recommending facemask because most are relying on the recommendations by the CDC and WHO. Unlike Taiwan, wearing facemask started when outbreaks in certain countries were already reported.

Wearing masks is a good topic for behavioral research. Perhaps we can collaborate.

Dear John,

Thank you or your answer.

Almost everything is to be done in mask research. The behavioural dimension you mentioned is nothing in terms of real scientific knowledge.

We as European Association of Public Health Schools do not make direct research, but point out what should done in countries and identify gaps of knowledge that should be researched.

You can find many of them in the Tecnical Report (V1). In TR-V3 (to publish soon) it will identify more than a double of calls of research.

Let us to know if you advance for some research programme.

Kindest regards

HL

There have been claims that masks are non-functional. This is entirely incorrect, even a mask that do not comply by the PP3 standard have a function.

It do prevent potential droplets from landing on lips and nose, this especially for persons who do send such drops when talking.

The wearer of a mask will in turn not spread any droplets, I linked one short Youtube film earlier in another thread and will repost it here: https://youtu.be/9qqHOKUXY5U

Any mask or even a bandana will prevent potential infectious particles from spreading as far as in that film.

I was going to add that wearing a mask is also a signal to others, Chan Kan Kam mentioned this above.

As the use of masks are not common here. The local reaction have usually been that the person wearing one is sick. This leads on to the question by the OP, and the interesting fact is that this now have changed, and while face masks still are uncommon - used by less than 5% of the people I encounter in a store. And of those it's far more Asian ethnic than of any other race. (And that's my own very unscientific estimate.)

The use of protective masks is not unheard of though. During the black plague face masks was used, back then people did not understand bacteria or virus. But they did think the infection was airborne and called in 'miasma' - so they were truly onto something.

So in this age of COVID-19, traditional knowledge should not be dismissed.

Anyway, I'd say that it seem that the reaction to a person that use of a mask have changed, as those are no longer given a wide berth.

So in a society where the use of facemasks have been very uncommon for a long time, I have noted a change, though I also have a hunch that the use will never be as widespread as in China or Japan.

Thanks for your testemony

Can wear 2 Face mask to prevent from COVID-19 ?

Thank you for asking this important question.

1. It is very common to see this practice outside Europe. The main reason is to save the expensive and difficult to access FFP2 and FFP3 (N95) respirators by putting on a surgical or social mask.

2. There is no evidence that there is an advantage because the main effect of masks in the context of COVID-19 is the protection of the Other, that is, retaining potential contagion within the mask.

3. On the contrary, it is known that the accumulation of layers increases respiratory effort and, by this means, potentially higher arterial tension, tiredness and some studies also point to increased dehydration, although this aspect is not consensual.

4. In the case of very young children, cases of hypoxia are documented in Japan.

In summary, there is no demonstrated advantage and there are some associated risks, and finally the consumption of a resource that is still relatively scarce increases.