[kwlug-disc] Fuming out about virus, security in depth

[Doug Moen]

I was going to post this link: https://arstechnica.com/science/2020/04/should-you-wear-a-face-mask-heres-all-the-data-we-have/

On Thu, Apr 9, 2020, at 12:43 AM, Doug Moen wrote:
> Ars Technica has some technical analysis for the effectiveness of various types of masks, including home made.
> 
> This article doesn't discuss the kind of clear plastic face shield that Canadian Shield in Kitchener is manufacturing for health workers (design is approved by Health Canada).
> 
> My wife sewed some masks, and we are using them to go out.
> 
> On Thu, Apr 9, 2020, at 12:30 AM, Khalid Baheyeldin wrote:
>> Viruses are very tiny. In fact, that is how they were first discovered: a scientist
>> who was studying the tobacco mosaic disease macerated infected leaves, then
>> passed the solution through a fine filter that prevents bacteria from passing through
>> (those are made from ceramic or other finely porous material). The resulting liquid
>> still infected healthy leaves. He concluded that there is a tiny organism causing it
>> 
>> Decades later, when the electron microscope allowed seeing things that are the
>> visible spectrum does not show. 
>> 
>> But I agree that masks will help. This particular viruses is produced in the respiratory
>> tract, and therefore spread by droplets. Even a cloth mask stops some of that aerosol. 
>> Think of a show fence, or droplets absorbed into the cloth. Something is better than 
>> nothing. 
>> 
>> Remember the saying: "Perfect is the enemy of good enough".
>> 
>> My wife sewed some unused T-shirts into masks, with a paper clip for it to fit on the 
>> nose, and we use them when we go out. 
>> 
>> 
>> On Wed, Apr 8, 2020 at 8:19 PM Mikalai Birukou via kwlug-disc <kwlug-disc at kwlug.org> wrote:
>>> It seems that starting from yesterday we should wear masks: 
>>> https://www.youtube.com/watch?v=9UuJyZA9MCU
>>> 
>>> <fume>
>>> 
>>> No, the laws of physics, chemistry and biology haven't changed. I am 
>>> having flashes of memory to how soviets were handling Chernobyl. WTF?
>>> 
>>> </fume>
>>> 
>>> Initially argument was that mask won't completely protect. Reminder that 
>>> 95 in N95 stands for a percentage. Anything infront your face will 
>>> reduce chances of getting stuff. Its like security in depth, no measure 
>>> is 100% reliable, but put together, and you are much better off.
>>> 
>>> Now I wonder how much slower virus would have spread, if on March 1st 
>>> we've heard wear bandanas and leave other masks to medical stuff.
>>> 
>>> First, its more difficult to touch face when in mask.
>>> 
>>> Second, mask is a reminder about new behaviour to yourself and to 
>>> others, right in the face.
>>> 
>>> Its like security in depth, like additional egress filtering and digital 
>>> hygiene. Not perfect, but let us go a long way.
>>> 
>>> 
>>> 
>>> 
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>> 
>> 
>> -- 
>> Khalid M. Baheyeldin
>> 2bits.com, Inc.
>> Fast Reliable Drupal
>> Drupal performance optimization, hosting and consulting.
>> "Sooner or later, this combustible mixture of ignorance and power is going to blow up in our faces." -- Dr. Carl Sagan
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> 
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