Facemasks - Which test results available to view without subscribing.

[cuffie81]

We could do with a review of the effectiveness of clear face shields too.

It looks like there's already been research into this, and it suggests face shields by themselves don't offer much protection.

Research from 2014 suggests they may offer some additional protection against infectious airborne particles for the wearer, when used in conjunction with a respirator. It's seems reasonable to think this may apply to Covid.


Face shields ineffective at trapping aerosols, says Japanese supercomputer
https://www.theguardian.com/world/2020/sep/22/face-shields-ineffective-trapping-aerosols-japanese-supercomputer-coronavirus

Face masks far more protective against COVID-19 than face shields, CDC experts
https://www.news-medical.net/news/20201008/Face-masks-far-more-protective-against-COVID-19-than-face-shields-warn-CDC-experts.aspx

Face Shields Not a Good Mask Substitute
https://www.webmd.com/lung/news/20200901/face-shields-no-good-as-substitute-for-masks-study-shows#1

COVID-19: Considerations for Wearing Masks
https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover-guidance.html#face-shields

Efficacy of face shields against cough aerosol droplets from a cough simulator [2014]
https://pubmed.ncbi.nlm.nih.gov/24467190/

[Gadget]

I think we've been looking at the same reports, cuffie 

[Llwyd]

It was interesting to note that in some of  today's advertisements for face masks their supposed percentage anti bacterial effectiveness was included. How scientific that percentage is or how it was arrived at I don't know. There was no mention of anti-viral effectiveness.
 

[cuffie81]

Somewhat related to the conversation, the UK nations' guidelines on face coverings.

The guidelines for Scotland, Wales and Northern Ireland are explicit that face shields/visors do not meet the description of the required face coverings. Scotland's guidelines state that evidence shows face shields do not provide adequate protection (but don't reference the evidence). Wales' guidelines state the protection offered by face shields is unknown.

On a related note, Northern Ireland's guidelines recommend not using face coverings with vents/valves.

UK
Face coverings: when to wear one, exemptions, and how to make your own
https://www.gov.uk/government/publications/face-coverings-when-to-wear-one-and-how-to-make-your-own/face-coverings-when-to-wear-one-and-how-to-make-your-own

Scotland
Coronavirus (COVID-19): public use of face coverings
https://www.gov.scot/publications/coronavirus-covid-19-public-use-of-face-coverings/

Wales
Face coverings: guidance for public
https://gov.wales/face-coverings-guidance-public

Northern Ireland
Coronavirus (COVID-19): face coverings
https://www.nidirect.gov.uk/articles/coronavirus-covid-19-face-coverings

[trystan]

I believe that is worth bearing on mind is that a virus will be most likely be transmitted in or on a larger droplet. This makes it more likely to  be trapped in a face covering than it would do otherwise.

[Skoosh]

Folks, you might have already seen this,

https://english.elpais.com/society/2020-10-28/a-room-a-bar-and-a-class-how-the-coronavirus-is-spread-through-the-air.html

Skoosh.

[Rena]

It doesn't bear thinking about that when we walk through the supermarket and shopping mall, etc., millions of tiny bugs, germs, virus are already lazily circulating; floating in the air, ready to land on anything that interrupts their trajectory - and that means by the time we reach home, we're covered in the pesky things.

[trystan]

That was a very good article. Great informative graphics presented in a way to make it easy to understand.

It does explain why many of us avoided going shopping, having meals out, going to pubs or going into other people's homes.

Trystan

[Top-of-the-hill]

  Yes, thanks for that Skoosh - a lot of food for thought.