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Item 1 of 2
expiredT-$hep posted Apr 20, 2022 6:13 AM
Costco Members: 50-Count BYD Care 3-Ply Single Use Surgical Face Masks
$5.00
$9.99
49% off
+ Free Shippingat Costco Wholesale
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+ Free Shippingat Costco WholesaleDeal Details
Costco Wholesale has for their Members: 50-Count BYD Care 3-Ply Single Use Surgical Face Masks for $4.99. Shipping is free.
Thanks to community member T-$hep for finding this deal.
Features:
Thanks to community member T-$hep for finding this deal.
Features:
- 50 Single Use Surgical Masks
- Three Ply Non-Woven Material
- Soft, Easy to Breath
- Non-Sterile
- Dimensions: 6.89" Wide X 3.74" Tall
Editor's Notes
Written by SubZero5 | Staff- About this deal:
- $5 manufacturer's savings is valid 4/18/22 through 4/22/22. While supplies last.
- About this store:
- Details of Costco's return policy here.
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for their Members: 50-Count BYD Care 3-Ply Single Use Surgical Face Masks for $4.99. Shipping is free.
Thanks to community member T-$hep for finding this deal.
Features:
Thanks to community member T-$hep for finding this deal.
Features:
- 50 Single Use Surgical Masks
- Three Ply Non-Woven Material
- Soft, Easy to Breath
- Non-Sterile
- Dimensions: 6.89" Wide X 3.74" Tall
Editor's Notes
Written by SubZero5 | Staff- About this deal:
- $5 manufacturer's savings is valid 4/18/22 through 4/22/22. While supplies last.
- About this store:
- Details of Costco's return policy here.
Community Voting
Deal
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+56
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Bad Deal
Top Comments
It's likely that face masks, by blocking even some of the virus-carrying droplets you inhale, can reduce your risk of falling seriously ill from COVID-19, according to Monica Gandhi, MD, an infectious disease specialist at UC San Francisco.
"The more virus you get into your body, the more sick you are likely to get," she said.
https://www.ucsf.edu/news/2020/07...k-covid-19
The idea that viral dose, also known as viral inoculum, determines the degree of illness is not new, said Gandhi. Descriptions of a dose-mortality curve – how much of a virus is needed to cause death in an animal – were first published in 1938. And after all, the earliest vaccines, which were documented in 16th century China, involved exposing someone to a small amount of smallpox virus to induce mild illness and subsequent immunity.
A small number viral particles is more likely to be quelled by the immune system before they can proliferate, said Gandhi.
Researchers have studied dose dependency experimentally with other viral infections, like the flu. In a study with healthy volunteers, those who received a higher dose of the influenza A virus developed more severe symptoms.
And even now, Nasal Spray Flu Vaccine use live flu virus.
Yes, using N95/KN95/KF94, you have much less chance to get sick because it filter 95%+ of the virus. But that still leave <5% virus get pass to you. And of course with <5% virus, it is much harder to get sick. So less virus, less likely you get sick. Or in good quality ASTM surgical mask case, 60~80% less virus (reduces the "inoculum" or dose of the virus), you may still get infected but you less likely get severe symptom. If you go to hospital that full of Covid-19 positive hospitalized patients, the viral load is so high that ASTM surgical mask won't reduce enough to make much differences.
Plus if you have a weakened immune system or some kind of underlying condition (which sometime people don't even know themselves), even less virus may still get you severe symptoms (or death) so the safest is still wearing N95/KN95/KF94 and vaccinated.
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94 Comments
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While doing this, I make sure the surgical mask is completely underneath my N95 mask and not overlapping OR overlapping completely, depending on the relative sizes of the two masks. This ensures good seal for N95 mask.
It's likely that face masks, by blocking even some of the virus-carrying droplets you inhale, can reduce your risk of falling seriously ill from COVID-19, according to Monica Gandhi, MD, an infectious disease specialist at UC San Francisco.
"The more virus you get into your body, the more sick you are likely to get," she said.
https://www.ucsf.edu/news/2020/07...k-covid-19
The idea that viral dose, also known as viral inoculum, determines the degree of illness is not new, said Gandhi. Descriptions of a dose-mortality curve – how much of a virus is needed to cause death in an animal – were first published in 1938. And after all, the earliest vaccines, which were documented in 16th century China, involved exposing someone to a small amount of smallpox virus to induce mild illness and subsequent immunity.
A small number viral particles is more likely to be quelled by the immune system before they can proliferate, said Gandhi.
Researchers have studied dose dependency experimentally with other viral infections, like the flu. In a study with healthy volunteers, those who received a higher dose of the influenza A virus developed more severe symptoms.
And even now, Nasal Spray Flu Vaccine use live flu virus.
Yes, using N95/KN95/KF94, you have much less chance to get sick because it filter 95%+ of the virus. But that still leave
As I previously stated, both these examples are cases that essentially involved universal masking. It is quite possible that the the reduced viral load was a result of less virus in the environment because infected individuals are wearing masks and emitting less virus as opposed to the masks actually filtering and reducing the viral load to healthy individuals. He fails to address this possibility.
As I previously stated, both these examples are cases that essentially involved universal masking. It is quite possible that the the reduced viral load was a result of less virus in the environment because infected individuals are wearing masks and emitting less virus as opposed to the masks actually reducing the viral load to healthy individuals. He fails to address this possibility.
So the disagreement is surgical mask just not filtering enough of virus? Or the question is how much virus will cause you to get severe symptom, then it is very hard to come up with a number since each person immune system is different.
As for surgical mask filtering, Aaron Collins has done some testing and ASTM level 3 surgical mask Filtration Efficiency is 51.6-76.7%.
https://www.youtube.com/watch?v=1-zRjrwsMWY
And ASTM Level 3 + Black Cloth with Nose Wire on top (double mask), it get to 91.7% filtration efficiency.
Double mask (with cloth mask) works but may not be a good solution since it needs the right combination which not everyone can get the right combination. Plus the pressure drop is not good when double mask (it may be harder to breath-in than N100).
Instead of double mask with cloth mask, you can use "Mask Fitters" but may not be comfortable and may not looks good. Some Mask Fitters use headband style and it feel just like wearing N95 which some people may not like.
The video show various "Mask Fitters" and filtration efficiency using Mask Fitters with surgical mask.
Armbrust Surgical Mask Filtration Efficiency measure at 63.7%
MaskLab Surgical Mask Filtration Efficiency 78.3%
Armbrust + Badger Mask fitter filtration efficiency at 97.2%
People, there's a giant gap on the right and left side where your cheek meets the mask. These mask's aren't protecting you from anything if someone with covid sneezes on you without a mask.
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Search on expiration date in reviews and few posts said the expiration date of the mask they received is Aug 2022 and they purchased the masks in March 2022.
If you keep it in right temperature and humidity, etc, probably can last a bit longer beyond expiration date.
People, there's a giant gap on the right and left side where your cheek meets the mask. These mask's aren't protecting you from anything if someone with covid sneezes on you without a mask.
I wear a mask when I'm working on the furnace in the crawlspace or trimming the trees in this desert state. I don't want to breath in the dust from the blown in insulation or the tree branches.I also wear one when my sanding stuff.. N95 is better but this is better than nothing..
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