Reducing transmission of SARS-CoV-2
science.sciencemag.org
science.sciencemag.org
It wasn't just the masks saga. Anyone with basic comprehension of physics and particle data can see how and why masks work, so Don't try to fool the public by lying and don't sit by when some colleagues are basically destroying the whole of the scientific community's credibility just to appease some political interests.
Same for 'social distancing' in enclosed spaces. If you let that sort of nonsense stand, how can you not realize you are just throwing the whole of the scientific trust under the bus?
And now the latest one: 'Children do not transmit the virus' just because some political parties want to reopen schools ASAP?
Just stick to the science, and leave the politics to the politicians.
As I said here back in March, the damage done to scientific credibility is the most saddening collateral in all of this. There wil always be some persons willing to do someone's dirty laundry for fame, gain or even just because they genuinly believed it all 'white lies' for the best of intentions. The huge failure of the scientific community was not calling them out.
I have seen multiple independent studies from different countries coming down with a very similar conclusion that children are not good vectors for this thing to spread.
OP's point is about if children transmit the virus. Either they do or don't.
But your question is about the efficiency of how children transmit the virus. It's an entirely different question although your personal choice of weasel words makes it look differently.
It makes no sense to waste time talking about efficiency if you're talking about a known virus transmission vector.
Please now explain how reopening the schools will reduce the replication factor.
That's a stupid remark. N95 are used mainly to reduce the emission of our own droplets, not to eliminate it nor to make us invulnerable.
Still, the recommended approach is still to stay at home and avoid contact altogether. As it's obvious to anyone, no exposure is far better than some exposure.
Who said this though? This seems like a caricature. All I remember is a bunch of confusing messaging from the WHO and a bunch of tut-tutting from experts warning people not to hoard or stockpile PPE that was needed more pressingly by health care workers.
Can you be specific about who said what, and when, that "destroyed the whole of the scientific community's credibility"? I just don't see it. In my world by late march everyone was wearing homespun masks form Etsy...
True, it takes a long time (often very long) to establish factual information that becomes widely accepted, but that is not the issue here. Also, the scientific method and peer-review process cannot be altered, and these processes (along with always following a strict code of ethics, staying updated on ethical matters, never compromising on ethics, and never losing sight of all of the above—ever) are even more important during a pandemic. Implying that these processes should be altered is unethical and unconscionable.
We have known that SARS-CoV-2 spreads via respiratory droplets, and that it was, most likely, by far, the main mode of transmission (although that would have needed to be demonstrated too, in a pandemic). Wearing a face mask to capture some of those respiratory droplets (even 10%) would at least help, and would not be insignificant if people are required to wear them in public.
We know that cloth masks capture more than that though.
Also, based on a case report, it is possible that up to 80% of COVID-19 infections are asymptomatic.
Considering that, and the fact that it is spread mainly by respiratory droplets, it is prudent to require the public to wear at least cloth masks.
Czech Republic (along with Slovak Republic—Slovakia) required people to wear face masks in public starting around March 13, and was one of the first western countries to require this. They are now easing restrictions and are doing well.
One of the countries I am sovereign to, Croatia, (US is the other one) has not had any reported coronavirus infections for 3 days in a row. You know, a former war-torn Yugoslav country, still feeling the after effects, with a relatively high and rapidly accelerating quality of life, by western standards.
Stuff like mask wearing is not rocket science.
But the idea that "Hah! The elites were WRONG about masks!" is just... weird. And doubly so because it's almost always promulgated by a demographic known for... not wearing masks.
I mean, seriously: if ("finally!") we're being told to wear masks, I'd expect a genuine mask evangelist to be happy, and to use this to encourage others to wear their masks. But that's not what I hear. It's like it's all a game of political gotcha.
It's not. Masks save lives. Wear your mask when you can't stay home.
Is this down to the WHO’s early messaging fumbles, misplaced machismo, ignorance, or what? When foreigners here don’t wear masks, they should know that the door is then open for Japanese people to lump all of us in together and say: “look, foreigners don’t give a fuck.”
Not the CDC, but the U.S. surgeon general, Feb 29th: "Seriously people- STOP BUYING MASKS! They are NOT effective in preventing general public from catching #Coronavirus"
https://twitter.com/surgeon_general/status/12337257852839321...
Once more data came in proving the effectiveness of masks, he acknowledged in a later tweet that this is incorrect, and encouraged mask usage. But that doesn't change the fact that there was a high-level denial of mask effectiveness.
P.S. I am in fact a mask evangelist, and I don't understand why anyone would avoid them given the data.
Meanwhile, you still see people wearing valved n95s, which I'm to understand are less effective in preventing transmission from the wearer (https://www.sfchronicle.com/bayarea/article/Coronavirus-Bay-... ). I saw that surgeon general tweet dozens of times from tut-tut types on social media at the onset of lockdown, but info on valved n95s is buried in a cdc faq: https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use...
This statement (my emphasis) is, as far as I know, still correct, because masks are only effective if fitted properly and people are trained to use them correctly (like absolutely no touching of the mask.)
What's changed (at least in the US) is that early on the focus was on people hoarding surgical masks because they thought it would prevent them from getting infected, in the presence of a widespread shortage.
Lately, the focus has been on the benefit of mask use as a means of reducing transmission of the virus, where the evidence points to mask use being uniformly beneficial and the concerns about mask touching etc don't apply since the assumption is that you may already be infected.
This is also what the "mask protesters" don't seem to understand (or ignore.) They talk about wearing a mask or not as a personal risk decision, when it's actually about whether you expose others to the virus.
Check out Australian news sites to see all the maskless people.
This is an opinion piece disguised as science. It’s presumptuous of a science writer to make determinations about whether and how society will be permitted to resume.
If we want people to be perfectly safe we’d also ban fast food, meat, alcohol, nicotine, driving and sex. But the goal of society is not to keep people 100% safe. Why are we okay with having our liberties trampled over an illness that the CDC estimates has a 0.26% death rate?
Every death is a tragedy, but we didn't do half-lockdowns for the flu before. Why are we doing a full lockdown for something that is 2x the flu.
Antibody testing largely supports a 0.4% death rates conclusion, I've tracked this data in a spreadsheet I made [2]. 0.4% is close to the mean and median of the studies I recorded.
Edit: I know it's gauche to complain about downvotes, but this post is just citing data to make a point. Even if you are worried about Covid, it seems dishonest to downvote data.
[1] https://www.wcnc.com/article/news/health/coronavirus/data-cd...
[2] https://docs.google.com/spreadsheets/d/16onEUBWIV5IqN1RCvTla...
If you are a programmer how much would you appreciate a medical doctor with no training or experience in software development questioning your technical decisions about what to use when building a software service?
I’m not sure what the basis is if your criticism. If a medical doctor wants to submit a PR I would review it based on merits.
But broadly, the studies I've cited largely back up the CDC's estimate of 0.4% IFR. Some of them have methodology in the papers themselves which give similar numbers, and I encourage you to read the raw data.
But an IFR close to the flu is not at all surprising. Covid is a respiratory infection. It kills the same way the flu kills (eg. pneumonia), so you'd naively expect them to have similar fatality rates and outcomes, and they do.
If I wanted to reduce the risk of acquiring or transmitting an airborne infection back in February, I would wear a mask and avoid enclosed spaces without waiting for CDC's permission. Indeed, I would ignore their advice to the contrary, which stood until April (!)
It would be really nice if we could defer to competent technocratic experts, but they earn their trust by having credible track records, not by collecting credentials.
The train to technocratic ditatorship is paved with... the great glucose poisioning epidemic, loss of free speech, loss of self defense. Todays conventional wisdom is often not looked on favorably in the future.
http://www.youtube.com/watch?v=TRnB9El_V5g
Are we going to wear masks for the rest of our lives (outside FFS)? Pandemics are an authortarian dream. The ability to engineer pandemics will only expand.
A bit of scale: Consider how many children go missing in the US each year.
COVID-19 mortality rates, however, are almost always reported according to narrower inclusion criteria (either positive COVID-19 dx or "presumptive COVID-19"), so there is a risk of an apples-to-oranges comparison here. One ought either count death certificates or estimate the total mortality burden, but not both.
There are two parts of flu/covid IFR: fatalities and infections.
For flu fatalities, the CDC does indeed upward adjust the count. They do this by looking at how many people died of pneumonia, and multiplying that by a number. The number is the estimated percent of pneumonia deaths that are from the flu, which they base on historical data.
For flu infections, it's a bit more obtuse. The best I was able to find was this paper from the CDC [1], which says they use a Monte Carlo model to estimate the number of infections.
For Covid, the deaths are based on diagnoses, not necessarily tests. Diagnoses are from symptoms, so it is not completely accurate. Some flu cases could be misdiagnosed as covid cases if you don't do a test. For infections, the numbers are typically based on the results from antibody tests (not Monte Carlo models).
I agree that it's definitely not apples-to-apples comparison, but it's hard to say if the comparison is in favor of flu being more deadly, or covid being more deadly, because there are confounding factors in both directions.
There is an (older) Financial Times article that did an excellent analysis on this (free to read): https://www.ft.com/content/a26fbf7e-48f8-11ea-aeb3-955839e06...
But, this article (also free to read) came out today from the Financial Times and is way better. The UK is doing far worse than the US interestingly: https://www.ft.com/content/6b4c784e-c259-4ca4-9a82-648ffde71...
Countries like France, Spain, and Italy (Mediterranean countries) in particular rank badly (besides having an uncontrollable infection problem) for the calculation of total excess deaths (compared to previous years) because they have some of the highest average lifespans in the world, largest percentages of elderly populations, and have extremely high quality universal healthcare (for example, the third leading cause of death in the US is actually preventable medical errors, so we really do not have phenomenal healthcare, even if you have “great insurance” and “can pay for it”).
> Aerosols can accumulate, remain infectious in indoor air for hours
I remember Michael Osterholm said CoV2 wasn't airborne, but respiratory, and he made the distinction airborne viruses stay in the air for hours (like Measles). "Aerosols" would indicate they mean respiratory but then they talk about it sticking around for hours.
> silent shedders
We are told there are asymptomatic people who spread the illness, but there is also tons of research to show they may not (https://pubmed.ncbi.nlm.nih.gov/32405162/) or that some of them weren't even asymptomatic; they had symptoms but no one asked (can't find that link).
This whole pieces seems like a long article to say "wear a mask," but all of us see people who wear a mask incorrectly or wear a cloth mask that isn't very effective against viral matter (https://www.acpjournals.org/doi/10.7326/M20-1342) and most people don't wash them daily, so they can build up moisture and bacteria (https://publichealth.uic.edu/news-stories/commentary-masks-f...). A lot of people treat them like a fashion accessory or just a thing they have to do and hang them up when they get home.
When states mandate masks, you're no longer asking people, and you brake the social contract. A lot of people do it just so they aren't shamed. A lot of people who don't wear masks do it as a political statement. When you boil it down ... it's all either political or shame.
There is a lot of explicit social conditioning and behavior modification going on here and it's sinister. I'm sick of pre-pubs that get contracted the following week and everyone going into hyper panic mode always. There are tons of secondary effects (people not going in for regular cancer screenings (https://unherd.com/thepost/professor-karol-sikora-fear-is-mo...), suicide attempts (https://archive.vn/N18t9), heart conditions, etc.) that will catch up with us.
I went into more detail earlier this month about getting fed up with our terrible information situation. This is not a time of honor:
https://battlepenguin.com/politics/this-is-not-a-time-of-hon...
Particularly, in Asian countries where mask wearing is already a somewhat common occurrence in public during the winter months.
Whether or not states should mandate masks is one question but businesses are entirely within their rights to require patrons to wear masks.
Whether people wearing masks for the right reasons or the wrong reasons doesn't seem that relevant to me. Shame is a motivating factor in many behaviors.
In short, wearing a mask is probably a good thing in the short term while we learn more about this virus.
If 80% of Americans wore masks infections would plummet https://www.vanityfair.com/news/2020/05/masks-covid-19-infec...
If people are too selfish to wear a mask I have no problem with a mandate.
Unfortunately, something as innocuous as mask wearing has been politicized in the US by certain unsavory political and media figures. In more enlightened countries and cultures (see most of Asia), wearing masks in the midst of a pandemic is just common sense. America is broken.
When I read into it it's not always clear masks work well to limit egress of virus, and I do think the scientific community is to blame to some extent for presenting things as "masks are scientific and lack of masks is not." This approach might only worsen things relative to a message of "we don't really know but it's a good idea to be prudent."
Linked scientific articles advocating masks I find are often misleading. They often are based on other viruses that potentially have other transmission properties, or make questionable assumptions, like that the mask is an n95 mask or is wet cloth. When I have found actual studies of SARS-CoV-2 with dry fabric of the sort most masks are made of, the masks work, but not nearly as well as you might think.
The problems with masks have really been underscored for me practically too. I've tried a couple of masks now, fit to my face, and I've run into a telling problem: when I breathe in mildly colder air, my breath shoots out from underneath my mask and fogs my glasses immensely. Not only is it evident in a very visible way that when I'm wearing the mask it's not actually blocking airflow very well, but then I have to constantly adjust things because I can't see, and sometimes have to resort to removing the mask entirely.
I still wear the mask and the fogging has gotten better as it's warmed, but my overall impression is that there are good reasons people might not wear masks, and I think the evidence in favor of them is much weaker and less rigorous than is often acknowledged. I think if the scientific community were being honest, they'd say they don't work great, but it's something, and every bit can count. That message seems to be enough; it would go a long way.
Funny, because that's exactly my impression of what they are saying.
Not as much as Ebola suits: https://www.welt.de/img/gesundheit/mobile130688133/039162761...
1 Ebola suit for everyone, with an air supply rucksack.
True story: I almost bought a 3M PAPR last fall because I wanted it for a "The Expanse" prop replica space suit I've been thinking about building. Decided that a few hundred bucks was too much to spend for the look of something alone, though. That would've been the best gratuitous purchase I ever made, in hindsight. Of course I probably still wouldn't be able to get filters for the thing, and properly caring for and disinfecting non-disposable hardware like that is nontrivial...