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Time to leave the Paleo diet?

Research on face masks before/during/after COVID showed they are ineffective (only an N-95 properly worn was effective as no cloth mask can stop COVID particles).

My N=1:
I never wore a face mask. I never had COVID.

I had a minor cold (less than a week) in April 2021 and October 2021. I've never had a cold/flu since.
Glad you have not had COVID. Best avoided.

The exhaled air particles that can contain covid from the lungs are well known. Same thing happens with TB and many other airborne infectious diseases. In occupational hygiene (aka industrial hygiene) it was well known that these fine airborne particles ("respiratory fraction" ie <5 microns or so) go around and through ordinary fabrics if attempted to be formed into respirators as do many large particles. There were studies published (refer Annals of Occupational Hygiene mid1980s) showing that. At the start of the pandemic quite a few in OHS raised concerns with the Health Authorities in various countries regarding the assumption that cloth masks would work as this defied aerosol physics. Cloth masks and surgical masks reduce the concentration of airborne particles by a factor or around 2 (on a good day) . A well fitting N95 mask (a real one not a black market fake marked N95) will reduce the concentration by about a factor of 10 or so. If you take off the mask for fairly short periods you can see that the protection factor will fall away quite rapidly ie 1/10th get through to the lungs vs 1/2. The same thing applies to TB and various other infections yet, medical practitioners, nurses and others were wearing surgical masks in TB wards and some were getting infected with TB until fairly recently. Some TB wards in some parts of the world may still only be using surgical masks. Anyway, it was no surprise that cloth and surgical masks had little or no effect on COVID as this was obvious to many with the technical knowledge. Yet, the health authorities (mainly medical doctors and specialists) were adamant that surgical and cloth masks were the way to go.

There are many examples where some people with some science training comment about things that are unaligned with the actual research available at that point in time. The same thing happens in physical training and those of you with a good knowledge of Strongfirst and similar methods are in an excellent position to make you own examples of others espousing methods that are less effective. For example, the superhard (over-)training of some endurance athletes vs the application of zone2\3. You can probably think of several other examples.

Pavel mentions at end of Q&S "each chooses for themselves" this applies to respirators, diet, exercise and so on. One choses and makes a sort of pact with nature. One eats and then gets the benefits and risks of your own unique choices.
 
Glad you have not had COVID. Best avoided.

The exhaled air particles that can contain covid from the lungs are well known. Same thing happens with TB and many other airborne infectious diseases. In occupational hygiene (aka industrial hygiene) it was well known that these fine airborne particles ("respiratory fraction" ie <5 microns or so) go around and through ordinary fabrics if attempted to be formed into respirators as do many large particles. There were studies published (refer Annals of Occupational Hygiene mid1980s) showing that. At the start of the pandemic quite a few in OHS raised concerns with the Health Authorities in various countries regarding the assumption that cloth masks would work as this defied aerosol physics. Cloth masks and surgical masks reduce the concentration of airborne particles by a factor or around 2 (on a good day) . A well fitting N95 mask (a real one not a black market fake marked N95) will reduce the concentration by about a factor of 10 or so. If you take off the mask for fairly short periods you can see that the protection factor will fall away quite rapidly ie 1/10th get through to the lungs vs 1/2. The same thing applies to TB and various other infections yet, medical practitioners, nurses and others were wearing surgical masks in TB wards and some were getting infected with TB until fairly recently. Some TB wards in some parts of the world may still only be using surgical masks. Anyway, it was no surprise that cloth and surgical masks had little or no effect on COVID as this was obvious to many with the technical knowledge. Yet, the health authorities (mainly medical doctors and specialists) were adamant that surgical and cloth masks were the way to go.

There are many examples where some people with some science training comment about things that are unaligned with the actual research available at that point in time. The same thing happens in physical training and those of you with a good knowledge of Strongfirst and similar methods are in an excellent position to make you own examples of others espousing methods that are less effective. For example, the superhard (over-)training of some endurance athletes vs the application of zone2\3. You can probably think of several other examples.

Pavel mentions at end of Q&S "each chooses for themselves" this applies to respirators, diet, exercise and so on. One choses and makes a sort of pact with nature. One eats and then gets the benefits and risks of your own unique choices.
The research on masks and COVID, as promulgated by public health and WHS agencies in Australia, showed that they were effective but only in circumstances where the public health directions on COVID were being breached - in order for the mask to be impactful, COVID transmission had to be possible anyway. That is people were not physically distant, were indoors, in poorly ventilated environments, were congregating for more than 15 minutes, engaged in heavy breathing activities such as loud talking, singing etc. I remember a lady wearing her mask and walking her dog, outdoors on the street, saw me approaching and quickly moved to the other side of the street. I was never closer than 20 metres to her. It's fair to say her mask provided no protection at all. But if we were sharing the same table, over lunch, at the indoor food court, her mask might well have made the difference between catching COVID or not. It's also worth mentioning that the effectiveness of public health directions are measured on massive scales, more so than any WHS intervention. An intervention that might make the difference between 100 and 99 cases in a workplace might be dismissed as ineffective as a WHS measure, but embraced by public health because it reduced cases in the population by 100,000.
 
The research on masks and COVID, as promulgated by public health and WHS agencies in Australia, showed that they were effective but only in circumstances where the public health directions on COVID were being breached - in order for the mask to be impactful, COVID transmission had to be possible anyway. That is people were not physically distant, were indoors, in poorly ventilated environments, were congregating for more than 15 minutes, engaged in heavy breathing activities such as loud talking, singing etc. I remember a lady wearing her mask and walking her dog, outdoors on the street, saw me approaching and quickly moved to the other side of the street. I was never closer than 20 metres to her. It's fair to say her mask provided no protection at all. But if we were sharing the same table, over lunch, at the indoor food court, her mask might well have made the difference between catching COVID or not. It's also worth mentioning that the effectiveness of public health directions are measured on massive scales, more so than any WHS intervention. An intervention that might make the difference between 100 and 99 cases in a workplace might be dismissed as ineffective as a WHS measure, but embraced by public health because it reduced cases in the population by 100,000.
A comprehensive formulation of risk assessment and control measures is beyond scope. My basic point was that the principles for the slection, fit and sue of respirators was well known prior to COVID and many infections would have been prevented if the same known scientific principles had have been applied. Exhaled air from a COVID infected persons and the fine particles in it do not obey the rules large particles follow. For example, sedimentation (settling) velocities mean they tend to float and follow air movement. If the air is still and you were to suspend one of these fine particles at head height and measure how long it took to reach the ground it would be many minutes or hours. Similarly, if air currents move these fine particles they can in fact travel substantial distances. I recall seeing papers published where an airconditioning system spread the exhaled air from a "super spreader" at least 10+ metres based on infected persons sitting down wind. The risk depends upon the number of fine particles that are inhaled. Fresh air is better but a respirator correctly fitted and used will reduce the concentration a known amount. It is difficult to understand how the public health authorities were prepared to specify ineffective masks unless they did not appreciate the ineffective ness. surgical masks and home made reduce the particle concentration by only a tiny amount (perhaps every second particle if you are lucky). N95 fitted and worn on the other hand stop 90-95 pc of the particle ie 1 in 10 or 1 in 20 penetrate into the lungs. Fresh air is better, but for air in a COVID environment an N95 is the obvious choice. [NB For the toxic dust, higher level respiratory protection may be required], For a bit more aerosol physics applied to COVID refer : https://www.science.org/doi/10.1126/science.abd9149 Like diet and physical activity use of masks is now a personal choice but for those that use them they should be aware that if they use surgical masks or home made masks they are wasting their time and money.

The main point that comes out of all this is that people need to inform themselves regarding science as well as they can so that they can make better choices. In the case of nutrition, the bare minimum is to put your diet through one of those nutrient apps that at least tells one how much they are getting of all nutrients and micronutrients. Next, try and optimise the concentrations of those nutrients and micronutrients - one will end up eating meat fish vegetables and some fruit and nuts. Then one should be able to identify the deficient nutrients and micronutrients and consider supplementing a basically health diet.
 
In all fairness, she might have just had a pint of Peroni and thought you were a malevolent goblin carrying a broadsword…
Yes, and he was wearing a boonie hat , yellow aviators, sporting a cigarette holder, and a strap-on dinosaur tail. And fly-fishing waders.
And possibly had a flashlight taped to his face.
 
A comprehensive formulation of risk assessment and control measures is beyond scope. My basic point was that the principles for the slection, fit and sue of respirators was well known prior to COVID and many infections would have been prevented if the same known scientific principles had have been applied. Exhaled air from a COVID infected persons and the fine particles in it do not obey the rules large particles follow. For example, sedimentation (settling) velocities mean they tend to float and follow air movement. If the air is still and you were to suspend one of these fine particles at head height and measure how long it took to reach the ground it would be many minutes or hours. Similarly, if air currents move these fine particles they can in fact travel substantial distances. I recall seeing papers published where an airconditioning system spread the exhaled air from a "super spreader" at least 10+ metres based on infected persons sitting down wind. The risk depends upon the number of fine particles that are inhaled. Fresh air is better but a respirator correctly fitted and used will reduce the concentration a known amount. It is difficult to understand how the public health authorities were prepared to specify ineffective masks unless they did not appreciate the ineffective ness. surgical masks and home made reduce the particle concentration by only a tiny amount (perhaps every second particle if you are lucky). N95 fitted and worn on the other hand stop 90-95 pc of the particle ie 1 in 10 or 1 in 20 penetrate into the lungs. Fresh air is better, but for air in a COVID environment an N95 is the obvious choice. [NB For the toxic dust, higher level respiratory protection may be required], For a bit more aerosol physics applied to COVID refer : https://www.science.org/doi/10.1126/science.abd9149 Like diet and physical activity use of masks is now a personal choice but for those that use them they should be aware that if they use surgical masks or home made masks they are wasting their time and money.

The main point that comes out of all this is that people need to inform themselves regarding science as well as they can so that they can make better choices. In the case of nutrition, the bare minimum is to put your diet through one of those nutrient apps that at least tells one how much they are getting of all nutrients and micronutrients. Next, try and optimise the concentrations of those nutrients and micronutrients - one will end up eating meat fish vegetables and some fruit and nuts. Then one should be able to identify the deficient nutrients and micronutrients and consider supplementing a basically health diet.
I agree with you about the declining effectiveness from respirators to surgical masks to homemade masks. I don’t agree that surgical masks or homemade masks make no difference and they continue to be referenced by public health authorities as a COVID control because while they might be poor performing at an individual level they’re still performing at a level to be considered beneficial population-wide (at least based on observational data). But everyone agrees respirators are best! I certainly wouldn’t bother with anything else. Another point is that COVID risk transmission frameworks included being present at a location after a COVID positive person had left (so called casual contacts) due to transmission from particles suspended in air and on surfaces but within a year or so those contacts had been rated very low risk and were then deleted from the framework (this is in Australia). To be of low, medium or high risk of contracting COVID a person has to be physically present with a COVID infected person. As you say, air flow can affect the zone within which someone can be infected, typically regarded as two metres but possibly further if the air flow is strong enough, the COVID particles in the air remain concentrated enough, and the person ‘downwind’ remains in the zone long enough. I’m not an expert on masks but I suspect that’s where surgical and cloth masks may still be protective, ‘downwind’ where the potential viral load is lower and people may be spending less time exposed.
 
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I ’m not an expert on masks but I suspect that’s where surgical and cloth masks may still be protective, ‘downwind’ where the potential viral load is lower and people may be spending less time exposed.

My understanding is that there is very little durable research that has actually been done. Observational studies and the ones included in the Cochrane review could not list compliance % with any confidence, making community spread reduction somewhat guesswork. We still have a huge gap in what is known.

Aerosol particle size determines effectiveness of improvised and then procedure masks on up to respirators. A good fit on an otherwise somewhat open weave will still catch a great amount of larger aerosol particles even if many of the smaller ones will get through. The need for a good fit was not stressed enough until later in the game, with some "studies" concluding that a good fit on a less effective material was better than a poor fit on a better material. I recall being fit for my full-face respirator to be certified for handling ammonia, the woman practically put a knee in the back of my head as she pulled in the straps. Then back under the hood with a foul smelling proof to see if I could detect any. As you say, the specific environment has a lot to do with the level of protection one might desire.

Tracking of serum influenza monitoring showed a precipitous decline as covid measures were enacted, taken as a whole they must have had an effect on C19 rates as well.

For myself I made a tremendous discovery when recovering from covid - if your sinuses are completely plugged, wearing a procedure mask prevents the throat from drying out due to mouth breathing. Somewhat inconvenient but worth it in my opinion.

If there's any takeaway from all this, its that we need to improve/expand UV air sterilizing. Cheap, effective, doesn't require individual compliance to work well.
 
I was never drinking the Kool Aid on COVID and found the stampede to harsh restrictions disappointing when that wasn't supported by anyone's pre-COVID pandemic plan. But it's also disappointing to see a rush to 'normal' without any consideration of lessons learned. Physical distancing, for example, ought to be a permanent consideration on a planet rife with respiratory illnesses yet here we are back to crowding people into meeting rooms, public transport, hospitality venues and event spaces as if the pandemic never happened. The coughers and sneezers are back at my workplace as if they never left, ably supported by the "I'm sick but I'm at work because I'm so important" crowd. Yuck!
 
I was never drinking the Kool Aid on COVID and found the stampede to harsh restrictions disappointing when that wasn't supported by anyone's pre-COVID pandemic plan. But it's also disappointing to see a rush to 'normal' without any consideration of lessons learned. Physical distancing, for example, ought to be a permanent consideration on a planet rife with respiratory illnesses yet here we are back to crowding people into meeting rooms, public transport, hospitality venues and event spaces as if the pandemic never happened. The coughers and sneezers are back at my workplace as if they never left, ably supported by the "I'm sick but I'm at work because I'm so important" crowd. Yuck!
It took a few months for me to be comfortable with all those other folk's disgusting exhale again "why was this EVER ok?" Now forgotten, or even embraced to challenge my immune system a little.
A link to an article I found re UV disinfection, something I knew nothing about aside from what the sun can do.
 
But how does one milk a seal?

Are there seal dairies raising mommy seals in big tanks full of fish for their milk?
Well dude, I thought the same when I read it. But I also know where the is a will, a way, and a boat-load of cash these things get accomplished. Like Bile Bears, Rhino horn powder, various parts of tigers and lions, shark fin soup. Could be a group of ballen clowns with their own little seaworld.
 
So many questions...


real-california-milk-logo-sealk.jpg
 
EX. Back in the day, when all 3 of these cats were in their prime, the Sultan of Brunei had Michael Jackson for his birthday party entertainment, and had Joe Montana and Hershel Walker fly out and give one of his kids some US football coaching tips.
You feel me ?
 
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