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#361 |
Illuminator
Join Date: Sep 2003
Posts: 3,688
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#362 |
The Grammar Tyrant
Join Date: Jul 2006
Posts: 33,233
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Bit more on the possibility of previous coronavirus infections offering protection: https://www.nature.com/articles/d41586-021-03110-4
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#363 |
Illuminator
Join Date: Sep 2003
Posts: 3,688
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Interesting paper.
One line of research that might be productive is testing for common cold coronaviruses among the PCR negatives. Then this could be tracked over time to see if it impacted covid-19 rates. If true, it shouldn't be too hard to identify which common coronavirus produce the T cell responses they describe. Once identified this could be added to the SARS-CoV-2 PCR-RT tests. If there were effective cross reactivity and a common cold coronavirus was responsible - bring on the cold parties like the measles parties parents had pre-vaccine. |
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#364 |
The Grammar Tyrant
Join Date: Jul 2006
Posts: 33,233
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Someone decided to have a decent look into Africa and why they're not in trouble from Covid.
No answers, but it does tend to confirm thousands of deaths aren't being covered up somewhere. https://www.nzherald.co.nz/world/afr...J6EMCCPIAMUGM/ My first thought was Vitamin D, and it's no surprise African nations are not generally deficient until higher latitude countries. South Africa being one of those, and where Covid has hit many times harder than the equatorial countries.
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#365 |
Graduate Poster
Join Date: Sep 2011
Posts: 1,984
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Frankly, none of those p-values should even have been reported, as no one cares (or should care) about hypothesis tests of "no effect" at any of those timepoints. Saying that they found no effect, when, in fact, they estimated a 23% effect is ridiculous. The point estimates and confidence intervals tell the real story. On the other hand, I wouldn't condemn the paper just because the authors reported a few silly p-values. |
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#366 |
Illuminator
Join Date: Sep 2003
Posts: 3,688
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I agree but standards in academic publishing compel publishing p values. What bugs me is the arbitrariness of p=.05. Less than .05 becomes "significant" and greater than .05 "not significant." People tend to ascribe greater weight to those words than they should. In this article they used the words "no effectiveness could be detected" which would be better written "no significant effectiveness was detected" in the standard, academic vernacular. I just look at the numbers.
Actually, at these low levels confounders are likely dominant. For instance people may, and in my experience are, less likely to get tested if they have sniffles if also vaccinated. That makes efficacy numbers lower than they are. |
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#367 |
Graduate Poster
Join Date: Sep 2011
Posts: 1,984
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You're right that p-values are often reported either out of habit or because journal editors expect them. But this is the first study on COVID-19 vaccine effectiveness that I recall seeing them. Since the purpose of these studies is normally to estimate effectiveness, only point estimates and their CIs are reported. In the current study, a Bayesian analysis would have been much more informative than the reported frequentist analysis. |
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#368 |
Crazy Little Green Dragon
Join Date: Sep 2011
Location: East Coast, US
Posts: 9,761
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Just to poke at this a little more... on a quick look, it doesn't look like there's any correction for age in that. Given that the average age in Africa is apparently less than 20 years old and the average age in South Africa is more like around 28 years old, that's fairly certainly something to account for before trying to draw much in the way of other conclusions (like looking at Vit D) based on that. |
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#369 |
Illuminator
Join Date: Sep 2003
Posts: 3,688
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P value "significance" is redundant when CIs are given for efficacy. When p < .05 the low percentage becomes negative. You're right. I don't see them in the this Qatar NEJM paper.
It has a rather extreme example that suffers from too small a sample size: https://www.nejm.org/doi/full/10.1056/NEJMoa2114114 Effectiveness of the BNT162b2 Vaccine against Symptomatic SARS-CoV-2 Infection and Asymptomatic SARS-CoV-2 Infection. Table 4. For Pfizer Asym Inf after 7 Mo. Point: −33.3 CI(−181.8 to 36.9) Will be interesting to see how this changes as more data accumulates. I don't expect the point estimate to remain negative. |
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#370 |
Schrödinger's cat
Join Date: May 2004
Location: Malmesbury, UK
Posts: 15,300
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"If you trust in yourself ... and believe in your dreams ... and follow your star ... you'll still get beaten by people who spent their time working hard and learning things" - Terry Pratchett |
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#371 |
Graduate Poster
Join Date: Sep 2011
Posts: 1,984
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To elaborate on that point, consider this quote that you took from the paper: Those same findings given a Bayesian interpretation would be, "From day 211 and onwards the the 95% credible interval for vaccine effectiveness was (-2%, 41%) indicating a probability of 0.965 that the vaccine was still effective." |
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#372 |
The Grammar Tyrant
Join Date: Jul 2006
Posts: 33,233
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#373 |
Penultimate Amazing
Join Date: Feb 2004
Posts: 17,348
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Hydroxy
Twitter thread:
Quote:
There is more in the thread. |
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/dann "Stupidity renders itself invisible by assuming very large proportions. Completely unreasonable claims are irrefutable. Ni-en-leh pointed out that a philosopher might get into trouble by claiming that two times two makes five, but he does not risk much by claiming that two times two makes shoe polish." B. Brecht "The abolition of religion as the illusory happiness of the people is required for their real happiness. The demand to give up the illusion about its condition is the demand to give up a condition which needs illusions." K. Marx |
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#374 |
The Grammar Tyrant
Join Date: Jul 2006
Posts: 33,233
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Here's a shock - ICUs in Britain are full of the unvaccinated: https://www.theguardian.com/world/20...s-wearing-thin
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#375 |
Illuminator
Join Date: Sep 2003
Posts: 3,688
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https://www.cdc.gov/mmwr/volumes/70/...mm7047e1-H.pdf
Risk of stillbirth deliveries when Covid-19 present. Pre-Delta, 90% increased risk. Post Delta, 300% increased risk. |
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#376 |
Penultimate Amazing
Join Date: Feb 2004
Posts: 17,348
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/dann "Stupidity renders itself invisible by assuming very large proportions. Completely unreasonable claims are irrefutable. Ni-en-leh pointed out that a philosopher might get into trouble by claiming that two times two makes five, but he does not risk much by claiming that two times two makes shoe polish." B. Brecht "The abolition of religion as the illusory happiness of the people is required for their real happiness. The demand to give up the illusion about its condition is the demand to give up a condition which needs illusions." K. Marx |
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#377 |
The Grammar Tyrant
Join Date: Jul 2006
Posts: 33,233
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There's a new hypothesis on why Japan has done so well in the recent wave: https://www.nzherald.co.nz/world/cov...4XXTQYC4BGDOA/
I'm not sure I buy it, but Japan does stick out like a sore thumb in the way each wave has broken long before it went nuclear, as it has everywhere else. I'm open to the possibility that the widespread masking causes evolutionary pressure that could have achieved what they're saying, but it definitely needs more work. |
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#378 |
Illuminator
Join Date: Sep 2003
Posts: 3,688
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Is there a published paper on this "theory?" Sounds like a bit of magical thinking. SARS-CoV-2 mutates a lot but if the mutation keeps it from propagating then that strain will die out. This actually happens often. There's a large number of mutations that aren't quite as transmissible and they lose out over time while new ones form and the main one keeps replicating until something comes along more fit.
What I would expect to see is a full genomic decode of viruses circulating in Japan and how they differ from those elsewhere. Then culture experiments showing it's less viable even while dominating in Japan. Not holding my breath. I'm inclined toward their more rigorous NPIs and mask adherence just dropping R below 1. And that would increase evolutionary pressure. It ends or becomes endemic when R drops below 1 from vaccination and prior infection. Found a bit more info in a Sun piece. It's a bit painful to read as there are contradictions in it. But this aligns with me: https://www.thesun.co.uk/health/1681...inction-japan/
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#379 |
The Grammar Tyrant
Join Date: Jul 2006
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#380 |
Philosophile
Join Date: Dec 2009
Location: Osaka, Japan
Posts: 33,995
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Sounds like bollocks to me.
My best guess is that the state of emergency + masking + vaccination campaign which started late but which has reached almost 80% of the whole population (whole population, mind you, not this "eligible population" crap!) has driven down the virus and prevented it spreading. Why is it sky rocketing elsewhere? Because people are acting like the pandemic is over in much of Europe. Or they were until it came back with a vengeance in the last few weeks. |
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#381 |
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Join Date: Jul 2018
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#382 |
The Grammar Tyrant
Join Date: Jul 2006
Posts: 33,233
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It wasn't, that was me speculating about some speculation.
That is the exact claim, and since the claim includes specific mutations, it should be easy to check that that's what actually happened. Or even a reintroduction of the same one. They won't keep it out. |
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#383 |
The Grammar Tyrant
Join Date: Jul 2006
Posts: 33,233
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Meanwhile, some extremely positive news on the Pfizer vaccine efficacy in adolescents: https://health.economictimes.indiati...onths/87862022
With our twelvie back at school and double-dosed, I'm pretty happy about that. |
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#384 |
Philosopher
Join Date: Jul 2013
Location: 49 North
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#385 |
Illuminator
Join Date: Sep 2003
Posts: 3,688
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I was looking at vaccinations over time in Japan. They had a late start but in the last 4 months they have gone from 30% to 76% of the population vaccinated and are now one of the most vaccinated countries in the world. They might also see a benefit because most vaccinated Japanese were recent so waning is minimal.
That alone would reduce R by a factor of >2. Looking at their case numbers, they peak right about the time vaccination rates hit 50%. Combine that with the NPIs Japanese tend to use more consistently than other countries and that remarkable reduction makes sense. Also, unlike many Western countries, they don't have highly polarized social groups separating vaxxers and anti-vaxxers that tend to socialize with those of like minds. This heterogeneity reduces the expected R reduction in regions with significant polarization. No weird mutations required. |
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#386 |
Philosophile
Join Date: Dec 2009
Location: Osaka, Japan
Posts: 33,995
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Yeah, that’s right. It has been pretty obvious here in Japan that the vaccinations combined with the mitigation strategies reduced the numbers. Of course that doesn’t stop some ******** like this from making up crap….
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#387 |
Philosophile
Join Date: Dec 2009
Location: Osaka, Japan
Posts: 33,995
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There was a time when I was inclined to believe Kory may have had his heart in the right place, but been mistaken. I now consider him to be a straight-up liar profiteering off the pandemic. What an absolutely disgraceful scumbag he is.
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#388 |
The Grammar Tyrant
Join Date: Jul 2006
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#389 |
Illuminator
Join Date: Sep 2003
Posts: 3,688
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Yeah. And John Campbell is flogging Ivermectin in his latest video. And he has vaccination charts that show the late, but remarkably quick increase in vax percentages. The coincidence with the peaking and falling of cases should have been jumping out at him as by far the most likely cause. But he missed it because he is so apparently wedded to Ivermectin. Sad because his stuff has been quite good outside of that.
Interesting how people glom onto a notion, marry it, and till death do they part. Learning is a search for things that contradict what you currently believe or expand knowledge you don't yet know. Both are critical. |
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#390 |
Philosophile
Join Date: Dec 2009
Location: Osaka, Japan
Posts: 33,995
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#391 |
Illuminator
Join Date: Sep 2009
Location: Olomouc, Czech Republic
Posts: 4,033
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I certainly noticed antivaxxers in the newspaper discussion often mentioning Ivermectin being the secret behind Japan's success. I wonder where it came from.
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#392 |
Philosophile
Join Date: Dec 2009
Location: Osaka, Japan
Posts: 33,995
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They just **** it out.
Basically, they have stitched together a narrative from some quote mining of a single video of the Tokyo Medical Head saying Ivermectin should be looked into, and that's pretty much it. These charlatans don't bother to determine how much Ivermectin has been distributed. They just look at a graph showing a drop in cases and then write the word "Ivermectin" on it. I remember someone saying here before that John Campbell is going to wait until the Oxford Trials are over before passing his judgment on whether it is effective, but he clearly claims it is achieving "miracles" now. If the Oxford Trial shows nothing, he will almost certainly say that the trial was flawed. If the Oxford Trial shows a minor, possible effect such as earlier clearing up of symptoms, then he will claim vindication. He doesn't seem to care that all the studies that have been showing a genuine strong positive effect have been shown to be unreliable or outright fraud. I wouldn't be surprised if he ends up going full-on anti-vax as well. |
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#393 |
Penultimate Amazing
Join Date: Dec 2009
Posts: 11,017
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Equality
Dr. Campbell did not seem able to grasp that not all protease inhibitors were equally effective. Color me extremely unimpressed. He is spreading nonsense.
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#394 |
Muse
Join Date: Apr 2004
Location: Hong Kong
Posts: 564
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That someone might have been me..
He will never, absolutely never go anti-vax, I would bet literally anything you want on it. I would even change my avatar to "Nogbad the Bad"! He has always been full on pro vaccination from the start, through the middle, and continues to be pro vaccination now, reporting the studies and the clear success of the vaccination campaign. He has always said we should not rely on vaccinations only, but should also use distancing, hand washing, ventilation, mask wearing AND if they show promise, therapeutics. He will never go anti-vax, because he believes in the vaccination campaign and the science behind it. The Japan question is kind of interesting though. If its all due to the vaccination levels, then why haven't we seen a similar drop off the cliff in other countries with higher vaccination like Canada, UK, Spain, Portugal? Or is the idea that it could be the rapid change in vaccination level rather than the level itself? How does that rate of change in levels compare to other countries with high levels, I wonder if there are others that have seen a similar fast uptake and saw the same drop. What's the social situation like there, are people masking 100% of the time like here in Hong Kong? Is there distancing and work from home etc? |
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#395 |
Crazy Little Green Dragon
Join Date: Sep 2011
Location: East Coast, US
Posts: 9,761
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So sayeth the crazy little dragon. |
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#396 |
Philosophile
Join Date: Dec 2009
Location: Osaka, Japan
Posts: 33,995
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Yes, Japan is 100% masked near enough 100% of the time out of doors.
Every week I go hiking with my family, and even when meeting someone coming the other way down a mountain, people will almost always still be masked. As for working from home, that was done to a large extent until recently, but now people are starting to come back to work. Pubs and restaurants are now serving alcohol again although they hadn't for quite a long time. There is still social distancing done where possible, and most places try to stick to the so-called 3Cs of reducing crowded spaces, confined spaces and close-contact settings. So although it is impossible to socially distance on trains, the windows will generally be open and everyone will be masked and talking is frowned on, etc... (not that subways and trains were ever vibrant locations for discussions, etc...) I think as marting said, the vaccination rate combined with a high buy-in of mitigation strategies such as masking etc... has probably led to the decline. I get really frustrated with Campbell though, because the trust that may well have been well-earned seems to be squandered by this kind of really obvious misinformation. I am just stunned that someone who people have looked up to in this pandemic is now telling his followers this kind of nonsense. |
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#397 |
Penultimate Amazing
Join Date: Dec 2009
Posts: 11,017
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What is Kory's angle?
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#398 |
Philosophile
Join Date: Dec 2009
Location: Osaka, Japan
Posts: 33,995
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Well, he has hundreds of thousands of followers now. Even if it started out with him being genuinely convinced of ivermectin's value, I think he knows the positive feedback he gets from promoting it, and also he's found himself getting way more traction among anti-vax people, so he has been promoting anti-vax too. He's been on big name podcasts like Joe Rogan, and made a name for himself. I think he even has his own podcast. There are donate buttons on his website, he gets invited to anti-vax jamborees on tropical islands, etc...
I don't know if he is selling it himself, but some ivermectin evangelists have been caught doing that.... https://www.abc.net.au/news/2021-10-...nnel/100571314 |
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#399 |
The Grammar Tyrant
Join Date: Jul 2006
Posts: 33,233
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New variant to watch very closely: https://www.theguardian.com/world/20...r-of-mutations
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#400 |
Penultimate Amazing
Join Date: Dec 2009
Posts: 11,017
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The good and the bad
In the spring I used Israel as a real-world example of the effectiveness of the vaccines. Do you have a link handy that discusses the downside (as suggested above)? I found this from the NIH director's blog. Thanks.
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