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Masks: Do they work? CDC Says No

Reformed1689

Well-Known Member
I had posted this in another thread but the mask supporters never answered:

Sure Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures

This study is about influenza but the way the two are spread are almost identical.

But here is a quote of note from the article:

Although mechanistic studies support the potential effect of hand hygiene or face masks, evidence from 14 randomized controlled trials of these measures did not support a substantial effect on transmission of laboratory-confirmed influenza.
 

Reynolds

Well-Known Member
Site Supporter
I had posted this in another thread but the mask supporters never answered:

Sure Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures

This study is about influenza but the way the two are spread are almost identical.

But here is a quote of note from the article:

Although mechanistic studies support the potential effect of hand hygiene or face masks, evidence from 14 randomized controlled trials of these measures did not support a substantial effect on transmission of laboratory-confirmed influenza.
Been my opinion from the start that non n-95 or above is 99.5% worthless.
 

Dave G

Well-Known Member
Although mechanistic studies support the potential effect of hand hygiene or face masks, evidence from 14 randomized controlled trials of these measures did not support a substantial effect on transmission of laboratory-confirmed influenza.
I've read articles by surgeons who confirm that surgical masks do not stop viruses.
All they can manage to do is to contain the moisture droplets being exhaled from the mouth and nose.

One surgeon even said that if he is sick,
he stays home because he knows that such devices will not stop infectious diseases.

Surgeons rely on the equipment in the operating rooms, such as the ventilation system and the sterile procedures, to help with that.

But I don't think that that is really the point, Dave...
If you were the C.D.C or W.H.O. and wanted to avoid mass hysteria in a world that largely does not trust God for their health and welfare,
what would you tell people?

To add an extra layer of "distance" and hygiene measures until vaccines are developed?
 
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JonC

Moderator
Moderator
So get your flu shot or wear N95 type masks (those seem to work, per the article).

I'd rather risk the flu, to tell you the truth.

And....you know something else that may work (of the homemade sort)? Duct tape. :Biggrin
 

just-want-peace

Well-Known Member
Site Supporter
So get your flu shot or wear N95 type masks (those seem to work, per the article).

I'd rather risk the flu, to tell you the truth.

And....you know something else that may work (of the homemade sort)? Duct tape. :Biggrin

Properly applied :Thumbsup, this would solve a multitude of problems!!:Laugh:Whistling
 

Reformed1689

Well-Known Member
Still nothing from the mask supporters. You know it's interesting when confronted with the ACTUAL science we get nothing but silence.
 

JonC

Moderator
Moderator
Still nothing from the mask supporters. You know it's interesting when confronted with the ACTUAL science we get nothing but silence.
Maybe because the flu season was so light thus year?

Many attribute this time mask wearing which seems contrary to the article (I doubt most people wore N95 masks).
 

Salty

20,000 Posts Club
Administrator
Still nothing from the mask supporters. You know it's interesting when confronted with the ACTUAL science we get nothing but silence.

Maybe they got tired of saying the same thing over and over - you know - just like the non- KJO crowed
 

Gold Dragon

Well-Known Member
I had posted this in another thread but the mask supporters never answered:

Sure Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures

This study is about influenza but the way the two are spread are almost identical.

But here is a quote of note from the article:

Although mechanistic studies support the potential effect of hand hygiene or face masks, evidence from 14 randomized controlled trials of these measures did not support a substantial effect on transmission of laboratory-confirmed influenza.

This report is consistent with what medical people and the CDC have been saying from the beginning.

Surgical and cloth masks are not designed to protect the wearer. They are designed to protect everyone else from the wearer.

These studies were studying transmission from the point of view of the wearer catching influenza from others which as we have been saying from the beginning, surgical masks and cloth masks are not very effective at doing because they are not designed for that purpose. N95 masks and similar respirators that are fitted properly are effective at this.

From the article:

Disposable medical masks (also known as surgical masks) are loose-fitting devices that were designed to be worn by medical personnel to protect accidental contamination of patient wounds, and to protect the wearer against splashes or sprays of bodily fluids (36). There is limited evidence for their effectiveness in preventing influenza virus transmission either when worn by the infected person for source control or when worn by uninfected persons to reduce exposure. Our systematic review found no significant effect of face masks on transmission of laboratory-confirmed influenza.


If you want to study how effective surgical masks and cloth masks are at preventing transmission from the wearer to everyone else:

CDC: Maximizing Fit for Cloth and Medical Procedure Masks ...

Masks substantially reduce exhaled respiratory droplets and aerosols from infected wearers and reduce exposure of uninfected wearers to these particles. Cloth masks§ and medical procedure masks¶ fit more loosely than do respirators (e.g., N95 facepieces). The effectiveness of cloth and medical procedure masks can be improved by ensuring that they are well fitted to the contours of the face to prevent leakage of air around the masks’ edges. During January 2021, CDC conducted experimental simulations using pliable elastomeric source and receiver headforms to assess the extent to which two modifications to medical procedure masks, 1) wearing a cloth mask over a medical procedure mask (double masking) and 2) knotting the ear loops of a medical procedure mask where they attach to the mask’s edges and then tucking in and flattening the extra material close to the face (knotted and tucked masks), could improve the fit of these masks and reduce the receiver’s exposure to an aerosol of simulated respiratory droplet particles of the size considered most important for transmitting SARS-CoV-2. The receiver’s exposure was maximally reduced (>95%) when the source and receiver were fitted with modified medical procedure masks. These laboratory-based experiments highlight the importance of good fit to optimize mask performance.

The reason surgical/cloth mask recommendations make sense is because covid19 can be transmitted asymptomatically or very mildly symptomatically. So it makes sense to mask everyone to prevent all the transmission from folks who don't realize they are infected.


I said the same thing back in March 2020 before the mask recommendation was in place because of shortages.

CA Governor Predicts 50% Infection (20m) Yet China Holding at 80k???

And April 2020 after the change in recommendation occrurred because the shortages were no longer the case.

Lockdown is Nonsense at this point
 
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Gold Dragon

Well-Known Member
The other thing to note is the small sample sizes of the studies, particularly of the source control studies. Altogether there were only 10 studies evaluated for masks and if many of them were underpowered by small sample size. It means that more studies with larger samples need to be done.

Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures

Most studies were underpowered because of limited sample size, and some studies also reported suboptimal adherence in the face mask group.

In the discussion they state this.

Although these measures have mechanistic support based on our knowledge of how influenza is transmitted from person to person, randomized trials of hand hygiene and face masks have not demonstrated protection against laboratory-confirmed influenza, with 1 exception (18).

...

However, as with hand hygiene, face masks might be able to reduce the transmission of other infections and therefore have value in an influenza pandemic when healthcare resources are stretched.
 

Reformed1689

Well-Known Member
This report is consistent with what medical people and the CDC have been saying from the beginning.

Surgical and cloth masks are not designed to protect the wearer. They are designed to protect everyone else from the wearer.

These studies were studying transmission from the point of view of the wearer catching influenza from others which as we have been saying from the beginning, surgical masks and cloth masks are not very effective at doing because they are not designed for that purpose. N95 masks and similar respirators that are fitted properly are effective at this.

From the article:




If you want to study how effective surgical masks and cloth masks are at preventing transmission from the wearer to everyone else:

CDC: Maximizing Fit for Cloth and Medical Procedure Masks ...



The reason surgical/cloth mask recommendations make sense is because covid19 can be transmitted asymptomatically or very mildly symptomatically. So it makes sense to mask everyone to prevent all the transmission from folks who don't realize they are infected.


I said the same thing back in March 2020 before the mask recommendation was in place because of shortages.

CA Governor Predicts 50% Infection (20m) Yet China Holding at 80k???

And April 2020 after the change in recommendation occrurred because the shortages were no longer the case.

Lockdown is Nonsense at this point
You even quoted the part where it says it doesn't protect the infected OR the uninfected. You should read the article again.
 

Baptist Believer

Well-Known Member
Site Supporter
No takers? Curious to hear from @AustinC and @Baptist Believer at least.
Are you really curious or do you just want to argue?

Still nothing from the mask supporters. You know it's interesting when confronted with the ACTUAL science we get nothing but silence.
Some of us have lives outside of this forum. I have had work deadlines, a friend whose mother was severely injured last week and needed my assistance. I also sat with him during her extensive surgery and helped out with practical needs. I also needed to help my in-laws with some things. Believe it or not, those things are more important to me than responding to your mistaken ideas.

Maybe they got tired of saying the same thing over and over - you know - just like the non- KJO crowed
Yes, exactly. If I thought the anti-maskers were actually curious to know what was true, I would forsake sleep and meals to assist. When all they want to do is argue, I am not highly motivated.

I had posted this in another thread but the mask supporters never answered:

Sure Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures

This study is about influenza but the way the two are spread are almost identical.
FYI, I reviewed this study back when you posted it on the other thread. The problems were so obvious, and I had so little time, I left it to others to explain.

But here is a quote of note from the article:

Although mechanistic studies support the potential effect of hand hygiene or face masks, evidence from 14 randomized controlled trials of these measures did not support a substantial effect on transmission of laboratory-confirmed influenza.
I’m sure you feel completely vindicated by one obscure study since you have labeled it as the conclusive statement of “SCIENCE!”

First things first. The title of this thread is a lie. The CDC does NOT claim that masks don’t work. Even a casual review of current mask statements demonstrates the lie. As you said in the other thread, one “has to dig” to find anything that may demonstrate that masks are ineffective. What you are digging into are studies from around the world that explains observations and results, some much better than others. Cherry-picking one Chinese study that is an aberration from others and designating it as “Science” and/or the definitive CDC position is a demonstration of extreme ignorance of how science works, the function of the CDC, a lack of ability to evaluate evidence, or simple dishonesty.

Looking at the study, we can see a number of factors that have to be considered:

(1) It’s a Chinese study. That doesn’t matter to me, but for all of the conspiracists out there who currently claim that the virus was created by China as a bioweapon, they shouldn’t take this study at face value. To the conspiracist, the Chinese are trying to harm us with this virus, so we should do the opposite of what they say. However, I take it at face value and think it is relevant, once one understands what is being said.

(2) We should also note that this study covers hand hygiene and masks. Their results appeared to indicate that hand washing is ineffective. Do anti maskers also refuse to wash their hands? Do they verbally assault people who wash their hands?

(3) The study primarily involves reviews of other studies in households, residence halls, and in Hajj pilgrimages from persons from various countries. In all of these situations, there was no mention of social distancing -- which is part of the mask protocol, since masks simply deflect/divert the virus-carrying vapor plume. If one wears a mask without social distancing, the mask will be ineffective.

(4) As you stated upfront, this is not a study of COVID-19 transmission, but of influenza transmission. Even during influenza outbreaks, I have never heard social distancing recommendations, other than persons who have flu symptoms should stay home and away from others. Often, because of the lack of social distancing in homes, whole families come down with the flu — and that’s what this study seems to corroborate.

So in conclusion:
  • The CDC did not make the claim that masks are ineffective.
  • The study cherry-picked as an example of “science” does not support the claim that masks with required social distancing protocols are ineffective.
 

Reynolds

Well-Known Member
Site Supporter
Are you really curious or do you just want to argue?


Some of us have lives outside of this forum. I have had work deadlines, a friend whose mother was severely injured last week and needed my assistance. I also sat with him during her extensive surgery and helped out with practical needs. I also needed to help my in-laws with some things. Believe it or not, those things are more important to me than responding to your mistaken ideas.


Yes, exactly. If I thought the anti-maskers were actually curious to know what was true, I would forsake sleep and meals to assist. When all they want to do is argue, I am not highly motivated.


FYI, I reviewed this study back when you posted it on the other thread. The problems were so obvious, and I had so little time, I left it to others to explain.


I’m sure you feel completely vindicated by one obscure study since you have labeled it as the conclusive statement of “SCIENCE!”

First things first. The title of this thread is a lie. The CDC does NOT claim that masks don’t work. Even a casual review of current mask statements demonstrates the lie. As you said in the other thread, one “has to dig” to find anything that may demonstrate that masks are ineffective. What you are digging into are studies from around the world that explains observations and results, some much better than others. Cherry-picking one Chinese study that is an aberration from others and designating it as “Science” and/or the definitive CDC position is a demonstration of extreme ignorance of how science works, the function of the CDC, a lack of ability to evaluate evidence, or simple dishonesty.

Looking at the study, we can see a number of factors that have to be considered:

(1) It’s a Chinese study. That doesn’t matter to me, but for all of the conspiracists out there who currently claim that the virus was created by China as a bioweapon, they shouldn’t take this study at face value. To the conspiracist, the Chinese are trying to harm us with this virus, so we should do the opposite of what they say. However, I take it at face value and think it is relevant, once one understands what is being said.

(2) We should also note that this study covers hand hygiene and masks. Their results appeared to indicate that hand washing is ineffective. Do anti maskers also refuse to wash their hands? Do they verbally assault people who wash their hands?

(3) The study primarily involves reviews of other studies in households, residence halls, and in Hajj pilgrimages from persons from various countries. In all of these situations, there was no mention of social distancing -- which is part of the mask protocol, since masks simply deflect/divert the virus-carrying vapor plume. If one wears a mask without social distancing, the mask will be ineffective.

(4) As you stated upfront, this is not a study of COVID-19 transmission, but of influenza transmission. Even during influenza outbreaks, I have never heard social distancing recommendations, other than persons who have flu symptoms should stay home and away from others. Often, because of the lack of social distancing in homes, whole families come down with the flu — and that’s what this study seems to corroborate.

So in conclusion:
  • The CDC did not make the claim that masks are ineffective.
  • The study cherry-picked as an example of “science” does not support the claim that masks with required social distancing protocols are ineffective.
Your point? Social distancing works equally well with or without masks.
 
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