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

[Doug Moen]

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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