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The ‘face mask’ you shouldn’t wear

Researchers at Duke University in Kentucky have conducted a study of 14 different types of face masks to see which offered the best protection and found that one option was actually worse than not wearing anything.

They examined surgical, N95, cotton, and polypropylene masks, as well as neck fleeces and bandanas, testing a person speaking 10 times while wearing each mask and compared to a ‘control trial’ of not wearing any mask.

In comparison to the ‘control trial’, most of the options reduced the number of respiratory droplets transmitted, adding to the body of research that shows masks are important to limit the spread of coronavirus, the researchers said. Polypropylene masks marked a droplet count that was close to the numbers counted for surgical and N95 masks which had the lowest number of droplets.

The neck fleece and bandanas, however, marked high counts of respiratory droplets, showing that these alternative face coverings offer little protection, according to the study.

In fact, neck fleece increased the number of respiratory droplets by creating a number of smaller droplets – resulting in more droplets than not wearing masks at all.

The study stated that since smaller droplets stay in the air longer than larger droplets, neck fleece may actually be “counterproductive”.

“We were extremely surprised to find that the number of particles measured with the fleece actually exceeded the number of particles measured without wearing any mask,” Martin Fischer, one of the study’s authors, told CNN. “We want to emphasise that we really encourage people to wear masks, but we want them to wear masks that actually work.”

8 comments

 

Thanks for bringing that to our attention Janelle

 

Great advice Janelle...in case there is some confusion what a neck fleece is, here's a picture:

 

JDC Double Polar FLEECE Neck Warmer Tube

 

 

 

Full-Face, Half-Face, Balaclavas, Bandana Masks, Triangle Masks ...

This is totally useless..yet it is promoted by the DHHS Victoria.

"If a face mask is not available, other forms of face covering may be used such as a scarf or bandana."

https://www.dhhs.vic.gov.au/face-coverings-covid-19#what-does-wearing-a-face-covering-mean

Strange I put up the same information early this morning and this part has been removed!

No S*** Sherlock. Who'd have thought, fleece, bandanas and homemade are of little to no use!

Maybe that's a contributing factor in Victoria!

Just get a proper mask people and then wear it properly with your nose INSIDE the mask.

I still see people wearing the valve type masks worn by tradies. They are designed to prevent breathing in sawdust etc but when you breath out the vent opens allowing unfiltered air to pass. Waste of time wearing those.

I'm a retired theatre nurse and my absolute bug bare at the moment are people who have their noses sticking out of their masks !!!!!! I have to stop myseof from going up to them and pulling it up like I used to with the students when I was a theatre sister.

What about the no regulation of joggers wearing masks. This virus will forever be spread by joggers. No wonder at the daily announcements of deaths.

 

Victoria’s Chief Health Officer has issued clear advice that masks with valves will not help to limit the spread of coronavirus.

Not all masks, however, are equally effective and the state’s Chief Health Officer wants people to understand that masks with valves should not be worn during the COVID-19 pandemic because the wearer can still breathe out the virus.‘It allows the wearer to breathe out more easily and stops moisture build-up, but the problem is that it allows you to breathe out virus if you’re infected,’

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Some cities are banning masks with valves…I feel it might not be long before they are banned here in Australia too.

In COVID, valve mask 'worse than no mask' - Times of India

 

8 comments