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However, both Rutherford and Chin-Hong cautioned against N95 masks with valves (commonly used in construction to prevent the inhalation of dust) because they do not protect those around you.
These one-way valves close when the wearer breathes in, but open when the wearer breathes out, allowing unfiltered air and droplets to escape.
Chin-Hong said that anyone wearing a valved mask would need to wear a surgical or cloth mask over it. "Alternatively, just wear a non-valved mask," he said.
A mnemonic that Chin-Hong likes is the “Three W’s to ward off COVID-19:” wearing a mask, washing your hands, and watching your distance.
“I think there’s enough evidence to say that the best benefit is for people who have COVID-19 to protect them from giving COVID-19 to other people, but you’re still going to get a benefit from wearing a mask if you don’t have COVID-19,” said Chin-Hong.
Masks may be more effective as a “source control” because they can prevent larger expelled droplets from evaporating into smaller droplets that can travel farther.
Studies have compared various mask materials, but for the general public, the most important consideration may be comfort. The best mask is one you can wear comfortably and consistently, said Chin-Hong. N95 respirators are only necessary in medical situations such as intubation. Surgical masks are generally more protective than cloth masks, and some people find them lighter and more comfortable to wear.
The bottom line is that any mask that covers the nose and mouth will be of benefit.
originally posted by: kent04
did some research this morning bc I keep seeing these mask posts everywhere, BUT everyone is wearing CLOTH masks
Avg pore size for .44mm cloth 31.0 um
Covid, Sars Virus circumference 100 nm
1,000 nm = 1um
.1 virus size to 31 pore size
That's like a virus the size of a 1x1 Beach Ball going through a hole the size of a Football Field!!!!
So, if your gonna wear a mask, please wear one with a 3m filter or something,
Please correct my maths if its wrong
originally posted by: AugustusMasonicus
a reply to: olaru12
I just use my covfefe filter.
originally posted by: AugustusMasonicus
a reply to: Nyiah
Did you really just contemplate crocheting a mask? Have you turned into your grandmother? What's next, crochet animals made around toilet paper rolls?
originally posted by: olaru12
originally posted by: AugustusMasonicus
a reply to: olaru12
I just use my covfefe filter.
I just asked my GF, the queen of pain, if she could crochet me one. She laughed and said why don't I wear a normal leather mask like everyone else.
originally posted by: AugustusMasonicus
a reply to: Nyiah
Well, crochet me a mask and a merkin in that case.
originally posted by: chelsdh
Or.... this. And I worked hard to snap this photo.
originally posted by: AugustusMasonicus
a reply to: Nyiah
Did you really just contemplate crocheting a mask? Have you turned into your grandmother?
What's next, crochet animals made around toilet paper rolls?