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A clothes-peg would probably work just as well - and be a lot cheaper. 
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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Clearly a lost opportunity in the visual appearance of that thing - clown nose, pigs nose, carrot, ...
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As Albert Einstein observed, the difference between genius and stupidity is that there are limits to genius.
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
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I thought he compared with the universe...
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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Don't you think it was just posted a week early?
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At first, I was surprised it was from Mexico and not Japan.
However, it didn't yet have the full Japanese Twist to innovation[^].
Please stand by for what's sure to follow!*
* Still not up to the level of my Seran-wrap toilet paper: comes with a squeegee and clips for hanging out to dry. No more paper waste.
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I don't mind wearing the masks. Some people really smell bad at Walmart and with a mask on I can't smell them anymore.
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Unfortunately I can still smell everything wearing a mask. Which makes me wonder how effective they actually are.
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Smells generally aren't particles or droplets, so against them it won't be effective at all.
For that you need a gas mask with activated carbon.
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SeanChupas wrote: Walmart
Found your problem.
There's a reason sites such as this exist.
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I seriously doubt the madness will ever stop. 
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Thars gold in them thar masks!... maybe. If there's a profit to be made, someone will try and make it.
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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clickety[^]
"If we don't change direction, we'll end up where we're going"
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That's some dank meme ... 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Someone has a budding business.
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This is by far the best explanation I have seen. Not only is this incredibly informative, it's a lesson in how to present complex(ish) facts in a way that everyone can understand.
Watch the video. Even if it's just to see how a 'scientific' video should be done! It's 7 minutes of your time that will be very well spent.
Why you can't compare Covid-19 vaccines - YouTube[^]
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Yep - 7 minutes of my time well spent.
Very well explained, doesn't sound like an advert (although at one point I thought it was drifting that way), really put across the message clearly.
Thanks for sharing
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Excellent, and very well explained. 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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I have watched part of it but I am concerned that if 43,000 people were in the trial and that 170 tested positive, that's 0.4% of the population testing positive.
My question would be what is the false positive rate on those tests? As that is a very small proportion of the total population becoming infected and quite possibly the 170 could all be false positives.
The UK ONS refuse to answer the question False positivity rate of the COVID-19 PCR test - Office for National Statistics[^]
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
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This is before I watch the video, but GuyThiebaut wrote: My question would be what is the false positive rate on those tests?
seems to leave out the obvious "what is the false negative rate".
In fact, the latter recently affected my son and his family: a friend tested positive and they were obliged to test themselves - then a retest of the positive friend and family were all negative. False alarm.
| Ravings en masse^ |
|---|
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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See my answer to Guy. Trials, I would hope, are going to be far more rigorous than testing in the real world. If Trials were based on a single PCR test, I doubt that regulators would accept the results.
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For me it's more that from a population size of 43,000 people, 0.4% of them becoming infected seems like a statistically very small proportion.
As they say the devil is in the detail and they didn't go into that very small proportion in the video - I just finished watching the whole of it.
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
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GuyThiebaut wrote: My question would be what is the false positive rate on those tests? As that is a very small proportion of the total population becoming infected and quite possibly the 170 could all be false positives.
I'm pretty sure that the trials would be rigorous enough to not be skewed by false positives. I've not been part of any trial, but I doubt that it relies on a single PCR test.
I don't think the ONS article, that you linked to, is related to trials. Its about the accuracy of the PCR Test in the real world. And within that article there is a link to a "Methods Article", which gives details about "Test sensitivity and specificity" - that explains their rationale on false positives. So the ONS are providing an answer - but, as you might expect with something like this, it provides a range, (85-98% accurate), rather than completely nailing it. I don't see how they could be completely accurate.
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