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Roger King
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Masks

Does anyone have any objective information on the efficacy of these? I have seen people wearing anything from builders' dust masks to what seem like proper surgical equipment.

Bearing in mind the extremely small size of a virus compared to even a bacterium, do any of the above actually have the filtering ability to capture them?

I suspect not, but genuinely wish to be educated.

Jonathan Kay
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nutty7
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Ivaan
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And in the construction industry, you have to carry out "Face fit" testing. Many masks don't fit.

Beards or facial hair also make them ineffective.

 

BECs Rule !
Golf Juliet Tango
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Jonathan, hyperlink overload - surely an executive summary would be far more helpful? After all you must have read each of to documents to which you have provided links?

Stephen

Democratic dissent is not disloyalty, it is a positive civic duty

Felixgogo
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Not at all objective - and indeed very subjective, but I've recently returned from Hong Kong, where the Covid19 hit before it was even named in January. Despite a late response from the government to close the border to China, the moment the news hit, everyone took to wearing masks in public overnight.

SARS in Hong Kong is still very recent and raw in the populations memory, so I think this helped people to have and wear masks where possible from the earliest moment.

The peak seems to have passed there, and there are officially 4 Covid19 deaths. 4! In a population of over 7 million. And where a large number of Chinese commuted in and out of HK before the border closure.

Probably not a fair comparison, but this is incredible when viewed against the UK numbers, where I have seen virtually no-one wearing masks.

TomB
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Golf Juliet Tango
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I also find it interesting that the Chinese reported 32 new cases, all of which they said were arrivals from another country. There were also 30 new asymptomatic cases reported.

Reporting asymptomatic cases shows they are testing for the presence of the virus.

Of course it is a shame that the UK have bought kits which only show when someone has been severely ill.

Reported in The Times https://www.thetimes.co.uk/article/britain-has-millions-of-coronavirus-antibody-tests-but-they-don-t-work-j7kb55g89

Considering everyone is dealing in brand new analysis it isn't surprising that some kits are not good enough but it is very frustrating.

Stephen

Democratic dissent is not disloyalty, it is a positive civic duty

eric
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Hello All

I am confined in south of France and I found a FFP2 mask, new but old 2001 .As I tried to remove the dust from the selves with my collection of Scalextric Caterham with my vacuum cleaner, I put the famous mask as the dust make me sneeze .  

Result : I sneezed in the mask ....   The dust goes through  Old and so not good I presume .

eric
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Just see that EN 149 2001 is not the year but the reference  ... not old so but not good for thee dust

elie boone
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Eric, maybe there was dust inside of your mask ? normally when you wear it correctly they are good against dust. With newly fabricated masks it could be different as some manufactures just send anything even those that normally would not pass QC