Viral mutation and evolution
Вставка
- Опубліковано 25 бер 2021
- Viral evolution
adenine, cytosine, uracil, guanine
Darwinian evolution
Species undergo random mutation
Making most less fit
But making a few more fit
Fit means compete, survive, reproduce
Natural selection will ‘select’ the more fit
Viruses usually become less virulent over time
Increased virulence / transmissibility
Mutations that increase transmissibility
Mutations that can avoid antibodies
Mutations that can avoid vaccination defences
Amazing. In less than 30 minutes you assimilated a full year of “genetics, biochemistry, virology, and immunology” in college. Great review for this old health care provider.
Great educator often go unheralded. 😉👍♥️
This a living library where most of us resource to get what to share to our listeners... Folks! This library updates us on different topics and amid knockdowns... We learn and sometimes it relieves us....
Let's pray that the covid-19 virus heads to the "less fit" mutation 😁😁😁😁
Yes, but a lot of it was wrong. No disrespect, I was a nurse, but I am also qualified in a lot of fields outside that, and he is clueless, and wrong.
and A VIRTUESIGNALING NONTALENT! .. The things you hear, when you don't have you're gun ! 🤪
@@mcconnellpeter could you say HOW he is wrong?
I have been watching your videos for over a year now-my cat, Doodle Bug, actually recognizes your voice. He watches along side. I would have to say Doodle Bug is more informed about COVID-19 than most of my fellow Americans. Thank you for your work.
But he fall in the same trip, corona not caused this pandemic, it’s herpes outbreak by magnetic field and solar storm
Hello Dooblebug! You have a great Mommy!
@@moheebsaad1918 Dear Moheeb, you realise you are now less informed than a cat?
@@moheebsaad1918 I am sensing a little sarcasm here haha
That is an adorable name for a cat!
It's shocking the level of abuse your Parker fountain pen takes. I would recommend to Parker that they use your UA-cam videos as an advert to the durability of the Parker Vector fountain pen.
Psml great comment 😂 best from Glasgow scotland stay safe 👍
@Peter Mortensen or profit over good quality and durability.
'The pen is mightier than the sword,' so the Medici-sin medicine liars say.
They did this with their plague-doctors when there was a real plague. Funded by the Medici family. Medici-sin.
lol
@Peter Mortensen haha... what little joys we can make out of JC's videos. Really making this not just informative but appreciating the trivial things... like why are made in China pens better than a Parker these days? 😅
Can not believe I have been watching you for over a year now. How time flies.
The most miserable and boring year in living memory. For me at least. I like Dr John but I hope I'm not watching these daily updates this time next year.
Time flies when you're having fun (not).
@@nickdeth24 Yes - for me I'm afraid listening to JC (useful though its been) will go into my horrible memory compartment along with mask wearing and social distancing.
@@nickdeth24 go learn about" The Great Reset "cos this thing aint ending anytime soon and you will see why
@@lightninggornall are you referring to the true Great Reset, or the conspiracy theory of the same name?
So well explained Dr John 👍👨🏫 I always learn so much! Love this channel 💕
Your knowledge is amazing. Thank you for sharing it...
Thanks Dr C, you break things down to digestible chunks. I'm still following you after a year and still spreading the Vit D message to all that will lend an ear. I do throw in some of your other gems to mix it up a bit! Thanks for all your time and effort 😘
You have a real gift for making difficult concepts understandable to laymen.
...... That explains a lot to a lay person. Thank you.
Well now we know your a layman, so we won't take what you say seriously the next time you make a comment
@@tomjohnson4681 The government ministers who are running this fiasco are basically laymen. They have to rely for advice in people who are supposed to be experts. They then have to make an informed descision based on that advice. Unfortunately not all experts agree and thats where the problem lies.
I realized I will never be as smart as you, but if I keep watching you at least I know I'm not as dumb as those on TV. 😉
What a brilliant way of saying what I’ve been thinking.
I wondered, did I know more now about the blood clot issue than the majority of the Leaders of European Countries🤔
Class comment josie made me laugh best from Glasgow scotland stay safe 👍
Lols. Very true.
👍🏻👏🏻
"Let me stick to the viruses otherwise we'll be here forever" this made me laugh! Also, I have a feeling some people wouldn't mind 😂
The only reason God created humans was to provide lounging space for the viruses otherwise they would have no place to live. got it ? Its a housing issue.
The Frankenstein Variant in progress , Ygor ‘s new books on Amazoo’n 📚!
In Short : it Sounds like if We don’t vaccinate the whole world by tomorrow , the vaccinated will become super duper dose carriers !
*HELP !!!*
The top lip was white , the Talk Stilted ! Should I be vaccinated or ... very worried ?
After this talk , probably vaccinated and very very worried 😟!
I certainly wouldn't mind. Dr John makes it all so interesting.
Yeah I don’t, learning some interesting stuff in simple terms
Same 😂😂
I haven't seen any friends over the last year, but I now consider you a friend, I look forward to your support, common sense and information, i feel i have made a friend and enjoy reading the comments of your other true followers/friends xx
I've been a happy and now informed follower for a few months also, Dr Campbell is a gem🙂
Thanks nicola we are a good bunch here plus we have a bit of wit and humour and we'll educated on this virus so we don't have any fear thanks to Dr John's calm updates best from Glasgow scotland stay safe nicola 👍
Go and watch Uk Column for some even better mates telling you a wjole lot moree home ttuths about your wonderful peoples in authorrity
I only read a few comments as if you delve pretty deep in the comment section you come across the Covidiots trying to push their propaganda and expert advice and 100% these people have absolutely zero medical experience and probably don't work at all... Its pretty mad lol how most people think they can even have views on subjects they don't understand at all like it was funny at first but a year into the pandemic it's growing ever more concerning these people are still pushing the nonsense.
Thank you Doctor John. Very informative and a bit scary. We are very blessed to have you to keep us updated. I also have been following your videos for over a year now.
Learnt so much this morning next to my coffee, thank you Dr John!
Thank you so much for these videos, been religiously watching you for over a year now.You are a natural teacher to break this down into manageable segments and keep it interesting. Love the tangents and occasional rants along with the English humor.
“Remarkably straight forward’ ..... when You explain it 😁 thank you.
Maybe you should read the open letter to the European Medicines Agency. The main author is Dr Sucharit Bhakdi many world renowned scientists as co authors. This human experiment has the potential for complete disaster.
Dr. Campbell makes me feel less stupid; or ignorant of science. More people should watch these tutorials.
Thank you for the continued education and information, it is much appreciated!
3:22 I love that the bird flies right by his window as he says: _"All life on Earth being remarkably similar."_
I see and hear you my winged fellow Earthling.
Funny shaped person? Looks like a well-rounded individual to me. Thanks much for your work!
How horrible. Good job.
And there was I, thinking that he was going to draw a cup of tea to dip the biscuit into. 😉
Thank you John for this talk today, very illuminating for me as a retired nurse. The energy you put into keeping us informed is admirable. How privileged are current health care workers to have you as a resource. How fortunate are we to have access to your calm and interesting lectures in a time when there is much disinformation and many people want to create antagonism online. I see the trolls are out in force as your blogs grow ever more popular. This has been a community i have felt honoured to be a part of for the last year, for anyone new on here take the negative comments with a pinch of salt and treat as a measure of John’s success and enjoy the wealth of knowledge available here. Stay safe everyone.
Thank you as always Dr. Campbell. I know this is a serious channel, and the effort you put into your uploads is greatly appreciated sir. Really tired of this current situation, and I want the mutations that lead to people getting super powers!😎
Boot burner, why don't you toddle on over to fox News or somewhere you'll be appreciated. Your harassment won't fly here, we all know Dr. John's background and appreciate his hard work keeping us informed
@@bootburner4544 You really are a scardey little worm, whats really going on is that fools like you get to spread pointless idiocies without ever being responsible for those you hurt, anonymous and virulent, a pandemic of liars with no end in sight
@@bootburner4544 Not too bad mate, what are these "freedoms" I have lost then? I was "warned" was I? About what? That crazy people like you would be flipping out cos they couldnt go to the pub? Enraged because they couldnt descend on small Med islands, get blind drunk and trash the place? That I wouldn't be woken up in the early hours by planes descending to Heathrow a few hundred feet over my head? That the air around me would be cleaner? That they would lock up the park behind me at night so that the drunken crazies couldn't scream their heads off till the early hours? That I could work from my living room and not get crushed on a train for an hour each way every week day? Brexit is causing more damage to my life - you know where to stick your warnings you strange little man
Thank you John for giving credit to Alfred Russel Wallace for his independant work on evolution through natural selection and to Charles Darwin for having the grace to acknowledge that they had come to the same conclusions and so agreed to jointly publish their papers on this new and controversal theory.
Maybe Mrs Wallace and Mrs Darwin had something to do with it!
@@jennywren8937 lol
I can just imagine it now:
"Now you two, play nicely together... Stop your arguing and admit that it was a joint effort! Don't you agree Mrs. Wallace?"
"Yes I do Mrs Darwin. Now play nice and go write your acknowledgements. Remember, be pleasent... No snyde, or back handed comments you two... I'm looking at you Charles... Is that clear?"
"Yes dear!"
"Aww... But Charles is always really mean to me and never let's me..."
"What was that? What did Mrs. Darwin and I just say?"
"Nothing... Er?... I meant, yes dear!"
"Good boys!"
😋
@@tmssp Yeah! Sometimes I say "Hey, I've got an idea" and he says "NO!" Would you Adam and Eve it?
Charles Darwin spoke with angels
@@markusmaximus6636 Really? I have another unsourced theory that there was hanky panky between the Wallaces and the Darwins, and someone took screenshots. No, that can' t be right.:))
Good Morning Doc and yes i have now been watching you for over a year now and i am happy for that :) Thanks Doc
In the end when you mentioned boosters, I was 'whew' from this 😟 to this😲 Thank you again, you deserve the gold medal 🏅 for 'relaying FACTS' during this confusing pandemic!!
Some people are natural educators and are able to explain complicated subjects in easily assimilated ways that others can't. No prizes for guessing which camp Dr John Campbell falls in to.
He is a fabulous teacher
Thanks Dr John for a very clear explanation of this topic and very pleased to hear from you so early in the day! Good morning everyone and enjoy the weekend.
Thanks Dr John, I’m definitely not a scientific person but I follow all your talks with interest. This one tried to go over my head but that final diagram made it all fall into place. (Just so long as I don’t have to sit any exams☺️)
Think of each of us as a Petri dish. The more Petri dishes exposed to the virus, the more opportunities there are for genetic mutation. If fewer Petri dishes are exposed, there are fewer total viruses in existence, less replication, and therefore fewer mutations will arise. This is how social distancing, mask wearing, and lockdowns prevent mutations-there are fewer Petri dishes exposed to the virus.
For those unwilling to be vaccinated because they “don’t want to be a guinea pig”, they are unfortunately already part of nature’s experiment. They’re volunteering to be a guinea pig in the control group.
@@MarcosElMalo2 through I’ve been suggesting to friends to follow John for verifiable information. Some gave, some I recap info that they will find useful
(Was trying to correct a spelling mistake) some I share the videos. I sadly know of fractured friendships where one side is adamant they are refusing vaccinations. They cannot be talked around but accuse those of us already a vaccinated as being responsible if they do catch it.
As I say there is no reasoning with them and we all make our own choices. My second is due in a few weeks.
Yes, you are perfect sheep!
@@MarcosElMalo2 isolated Petri dishes are far worse than Petri dishes where dominant strains can evolve and spread quickest.
The most interesting talk, for some time. Thanks, Dr. Campbell.
Dr John: A lot of people have been talking to me about virul mutation
Me: A lot of people have been talking to me about vacuuming, drinking and Amazon packaging
😅😂😅😂
😄
Bloody Amazon packaging 📦 📦 📦 📦 📦 tell me about it, its a menace, isn't it?
😀😀
@@patrickmooney5035 That packaging is constantly mutating
Thanks for your dedication to public health information. I have watched most of your COVID articles so far.
I appreciate you’re ability to explain complex concepts to non scientific types like me. Also appreciate defining terms up front.
The truth is there is no Sars2 virus, no pure isolate of it exists anywhere www.fluoridefreepeel.ca/fois-reveal-that-health-science-institutions-around-the-world-have-no-record-of-sars-cov-2-isolation-purification/
The so called variants should be taken with a pinch of salt though the vaccine companies will have a new vax for every variant
@@daverok1113 Idiot troll
Good morning John just to say that I really enjoy listening to your talks and follow them daily. I find them easy to follow, well mostly. Yours sicerely Liz
This was excellent. Thank you.
No, you're being conned😉, he's a nwo afficionado me thinks
Thank you Dr C.
A very interesting talk today.👍
When you mentioned the rabbits and the camels in Australia I smiled. So very true.
Remember to subscribe everyone... I’m itching to see the 1 million plaque appear on his bookshelf.
Cheers to all, have a great day and stay safe.
Oz ships camels to Saudi Arabia for racing.
John, you are a brilliant teacher! I actually understood that. Huge thank you, keep up the good work.
Morning ...great topic for early Saturday morning 😁
late saturday afternoon here :)
Thanks for the update, you do help make some sense of all this. That is to say with an absence of political views.
How is this absent of politics?
@@PravinDahal basically no political view. If you look at the EU and vaccines esp the oxford one.. where they ..lets just say 'poo poo' it. Its not based on science but on a political move to hide the EU's fails on getting this virus vaccine. Its just refreshing to see someone explain the science of it without giving their political view. Major medical institutions like the WHO seem to be governed by Politics NOT science.
@@jobearesto9746 Pharma politics exists and they decide how these agencies operate because they have them by the balls. AZ vaccine did it wrong by making the non-profit pledge, which is biting them on their asses now, because competitors who intend to make enormous profits are willing to invest some more on their PR budget, mostly to stain the much cheaper competition.
The nurse guy here is also held by the balls. Pharmaceuticals will immediately come after his UA-cam channel, his reputation and potentially his pension if he actually addresses this. So, he sidesteps it by saying "it's bizzare, I don't get it" or something to that effect... and keeps himself on their side by spinning everything to be pro-vaccine in general.
I believe that he believes what he says and I don't doubt his honesty... but if he wasn't held by his balls, I'm sure his beliefs would be more aligned with reality.
@@PravinDahal You actually have it somewhat backwards. Oxford originally was going to partner with Merck, a world-leading vaccine producer/distributor (and the originator of the technology Oxford is using). They however chose AstraZeneca who had very little experience instead because of the potential to earn more money in the long run with AZ (reportedly 6% royalties vs 1%). Another reason given was that Merck is an American company while AZ is a British company and they were worried about how that might impact deliveries to the UK. (It’s a shame that the E U wasn’t as wary of that issue).
This is the first video in a long time where Dr. John hasn’t injected his political opinions. Just the science.
Hi DJ, nice talk on viral biology. Just to be clear, high transmission/infection = higher virulence probability.
In the lab if you want to up viral virulence, you speed up the certainty of viral transmission.
When a virus has certain transmission, virulence goes up - eg, it has no need to worry about killing the host.
So in a viral pandemic it is worth keeping the number of infections down, to slow transmission, in order to lessen the risk of more virulent strains evolving.
What's your opinion on the vaccines?
@@maxmorris4562 As soon as you can get a jab, seize the opportunity. Any vax doesn't matter. The faster the rollout the better.
It's a big subject but I hope that answers your Q.
@@maxmorris4562 My opinion? I hope mine worked. Pfizer-BioNTech.
@@rodwallace6237 No worries. The mRNA vax's are exceptionally good. There's research ongoing to use them for curing cancer and other diseases. They are also the quickest to develop and modify to new strains.
My only downside on vax's is that they should not be over used for young children unless absolutely necessary. Their immune system is developing and different to a teenager/adult. Best to let kids get as dirty as possible, to get their immune system in tip top condition.
Peter A - I completely agree with your second point about children - very wise, and so true. But I can't embrace your first point about the mRNA vaccines, because the jury is still out on those until the the results are in (late 2022). I was reading through Moderna's website, and they refer to their mRNA product development, as an 'operating system' (quote)... able to receive 'Apps' (quote).... and upgrades. Sounds very much like the phone in my pocket, or windows on my PC! Whichever side of the fence individuals are on, regarding GMO, this is certainly a pivotal moment in humanity and our evolution into a new technological era.
Brilliant as usual! Thank you so much Dr Campbell
Thank you so much for your very simple explanation of a very complex subject Dr John.
Yikes! Thank you and please continue your teaching!
Thank you, really easy to understand because you are a great health teacher. Hope you get to a million subscribers soon.
I wish I had you as an instructor in nursing school way back when. You make complicated issues much more clear. Thanks for all you’re doing!
Thank you for illustrating and explaining mutations. 👍
He makes complicated things so easy to understand, which is very much appreciated by many.
He forgot the bit about coronavirus hybrid strains. not all mutations are about single letters changes some of them can rewire half the virus through a single host. If two different viruses get sucked through the ribosomes at the same time.
Although worrying, this must be one of the most important videos you have done, along with the one featuring Dr. Lawrie's research on Ivermectin. Thank you.
Totally agree. I would add the Vit D ones too. Such simple explanation of complexity.
Viral Amplification... I learned something new today... scary stuff... but well worth knowing about. Thank you again xxx
Thank you for another excellent update!
Great overview - Thanks John
Those of us who are not scientists enjoy your informative talks Dr. Campbell. Thank you.
I work in science and enjoy them too, his teaching methods are great 👍🏻
As do us who are
Great video John, be nice to have guests on to talk about this in greater detail, heard one doctor say what terrifies him is if one of these variants takes hold and then starts hospitalising people in big numbers who have 2 doses of vaccine.
Hi John...nice Saturday morning watching your vid
Wonderful educational episode John. 👍🏽
That was brilliant Doc...👍
I'm here for Dr John 24/7
VIRTUESIGNALING much?
Have you bought your toilet roll for 2022?
@@MikkelGrumBovin
@@MarcosElMalo2 ouch - you got me real good there - Wyatt !
Thank you so much for the information! I asked a question in the comments the other day and this video explained everything. Thank you again for all your research and dedication!
Thank you for making it simple to understanding this crazy changing and dangerous predicament we are in.
My wife and I got our first jabs a while ago with no reactions in either her Phaser or mine Aztra vaccines to date.
We are now waiting to be given the second jabs hopefully within the twelve weeks period. London. UK.
Excellent explanation thank you Dr John.
Love the facemask on the doggy touch haha
Good stuff.
Love you Dr. John. You are a rockstar. I go to bed every night listening to your voice. You are the Edward R. Murrow of this modern day war. You deserve some reward when this is over for your perseverance and tenacity for keeping us informed.
Definitely. Perhaps an emmy to a *truly deserving* person.
Doc. I am eternally grateful for who you choose to be.
Good Morning John Campbell and all
Hi Dr. John, I've been watching your vids since the pandemic started. Awesome vids. Very informative and easy to understand. Thank you so much for all you do.
Question for you..
What do you make of the "Double mutant" Covid variant found in India?
A nice explanation of evolution. Keep up the good work!
Thank you so much for breaking down the details about mutation.
We still need to wear mask and wash hands , sanitize .
Sherlock,-
Yes still wear mask... With zero evidence proving significant benefit in redusing spread... Why follow scientific method and empirical evidence.. When you can follow religion of safety.. Pls you are always welcome to prove me wrong.
????Dr John - Have you heard from Dr Tess Lawrie recently? Would be interesting to hear news of her meta-analysis progress.
Thank you for your explanation on the variants. Found it very informative. You do a very important educational service thank you for your conscientious efforts and time.
@@daverok1113 Oh dear. My brouser says that site can't produce a secure connection.
@@brianfretwell3886 For at least two years, security experts at Google and other, more neutral sources have all agreed: do not trust sites that cannot give you a secure connection. So this is another example of how untrustworthy daver ok is!
@@brianfretwell3886 So try duck duck go
Hello Dr John hello everyone 😷✌️
🙋♀️ from Sydney
@@vtee361 Hi, Dino, from UK
Hiya dino ;)
I love how he uses rabbits in Australia as a way to describe something out of control.
That was funny agent made me chuckle 😂 best from Glasgow scotland stay safe 👍
That made me giggle too :-)
A more pleasant example than say, cane toads.
@@dootu Sigh. Mice, brown recluse spiders, cane toads, rabbits flowering in a land evolved for marsupials. That ecosystem needs some serious sorting out.
@Radwyn Althor Something I'm painfully aware of. It would be nice if the people in charge over the last, say two centuries or so, had understood that and acted upon the potential consequences. We are, a short-sighted species.
A lot of jealous people on here today going on about their qualifications.
John is using his amazing educational skills to help people who are not immunologist etc.
He presents evidence with references so all can be checked by viewers.
Be thankful for him.
well said. i think it's time those people began their own youtube channels and got out of our way.
No evidence to support todays claims
@@daverok1113 only because what he says is established in the literature historically
@@christinafarrlley8930 No it is not
Show me evidence for masks and lockdowns pre 2020?
Try 1918 'flu epidemic
If I am understanding this, the variants may be an asymptomatic presence in a vaccinated person, who will then transmit this new variant to others. So, even tho we are vaccinated, we are still at risk for contracting the new variants with, perhaps, a milder case. But, more importantly, we can be super spreaders of the new variants???? Is this correct? So my relief at being fully vaccinated and not a significant danger to others....well....that is dashed completely?
Yes and at least one eminent scientist has warned the WHO about the possible dire consequences of that so they can't say they were not warned anf therefore should be held to account!
Mass Vaccination in a Pandemic - Benefits versus Risks: Interview with Geert Vanden Bossche PhD, who is an internationally recognised vaccine developer, virologist,having worked as the head of the Vaccine Development Office at the German Centre for Infection Research. Coordinated Global Alliance for Vaccines and Immunisation’s , He believes he is now morally obligated to put his professional reputation on the line to get this scientific information out to the public, and has sent an open letter to the World Health Organisation highlighting the dangerous principle of mass using of a prophylactic vaccine that does not 100% eliminate infection and transmission in the recipient whist still in the midst of a pandemic which is highly likely to create super vaccine resistant variants in the process . If you are interested on his analysis , This is the link ua-cam.com/video/ZJZxiNxYLpc/v-deo.html
Pre symptomatic spreader.
Another great update Dr john thanks for the fantastic information very interesting chat best wishes all from Glasgow scotland keep up your safety protocols all remember your vitimin d best from Glasgow scotland 👍
Excellent presentation as usual,AND the lighting and/or makeup crew is/are back to their usual standard of excellence!
I wish my teachers at school had been able to explain as well as you. I love this science stuff but after a certain point I need it explained rather than reading an ‘age appropriate text book’ and they just couldn’t do it.
At university I had a course called communications. The teacher was awful and could not articulate.
Irony of course she was teaching communications, but couldn't communicate.
Dr John does a good job getting his message across
For anyone wanting in-depth information on virology, twiv is doing a virology course that explains this in a lot more detail.
What a fantastic teacher!. I learn so much. I wish I had trained as a Doctor 40 years ago now. This is really fascinating stuff.
Dr. Campbell, when this pandemic is over (well, the virus controlled or eradicated anyway), I hope you'll continue doing these videos on other topics in medicine for the general public like this!
As long you limit your self to 30 m. I can lisen Forever. Thank you very much Dr. J.C!!!
Forever can last longer than 30 min
I had to read that twice I thought you were advocating 30 meters social distance.
Play at a faster speed. Saves time.
@Peter Mortensen and they spelt listen wrong
@Peter Mortensen the talk is 30 meter long it seems ha ha
Thank you so much for this video, great work
Excellent presentation. Thank you.
Thank you Dr John because I don't always follow the statistics and then you totally clarify the message of the data!
Dear Dr. Campbell, Thank you for your clear and understandable explanation of how this virus is spreading.
For a long time, I wondered as to how, with people seriously following the health department guidelines, the virus seems to keep on spreading anyway...like it has a "mind of its own." I kept asking, Why?
Your explanation really helps.
There are people I know, who have quarantined this past year, always ventilate their apartment, wear masks, hand sanitizers; who make one little mistake: go out to do something, and end up in the hospital. It seems so unfair. Your diagrams showed how easy it is, to catch the mutated virus from breathing the air. How bad the result will be depends on whether the person is vaccinated (with immunity built up over several weeks)...or not vaccinated.
He's back. Your up early today Mr
Or Dr. John is burning the midnight oil.
@@gaylehorton5301 is the daylight artificial?
@@zentamm I think he meant the preparation, not the recording.
my vision is very bad at the moment (thanks Behcet's!) so I apologize if this is not readable! but my question is are viruses still sort of classified as alive but not? like the categorization of "just alive;" has that stuck or have we discovered more about them?
Thank you Dr. Campbell, this was very informative, and easy to understand for regular folks like me. Great explanation of the very complex issue.
Yes! Cristalclear explanation! Thanks.
Except the bit about covid presymptomatic transmission in the middle of the video.
Shorter and shorter incubation, would have an evolutionary advantage, unless we had a ludacris lockdown.
This virus is not only spread at the pre symptomatic stage, so the effect of becoming more mild is only reduced not eliminated. If symptomatic people can't spread the virus then nurses wouldn't need any PPE now would they?
Thank you Dr. Campbell for the thorough explanation!
Thank you for all you do Dr. Campbell god bless you and your family 🙏
Thank you for this. This is exactly why I started really paying attention to this virus when we first found out about it, and have had to explain this to so many people throughout this year who were so convinced that it could only become less virulent because "thats how viruses work". It is so nice for people with better platforms to explain it, and as always, you do a wonderful job!
It’s a bad point for misunderstanding. The tendency towards less virulence might take decades or centuries to unfold. It’s better to think of there being an upper limit or ceiling to virulence. A virus that kills its host too quickly won’t be able to replicate and be transmitted for very long, and will burn itself out. However, a virus with a high rate of transmissibility has a higher virulence ceiling. With high transmissibility, there isn’t as much selective pressure on virulence.
Thank you dr John - this virus makes every day a school day! Your input is so much appreciated 😷
Yes, but unlike school, this is enjoyable
You hit that one out of the park Dr. Campbell. Thank you!
This video is worthy of a Royal Society Xmas lecture. Perfectly paced for my lay-person noggin. Superb, as always.
Early in Texas. 1:56 am in Austin and 62 degrees Fahrenheit going to get up to the mid 80’s this first week of spring. Be summer probably next week. Better than the winter couple weeks back. My wife got her first jab a week ago and is fine. Hopefully get mine soon, been waiting awhile. So good to see the Doctor this early. Good day all.
Good grief you weather changes fast. 🇬🇧🇪🇺
Miami 76. 326am
Fred Chapman, There is an old saying here: If you get tired of the weather In Texas, don’t worry it is about to change. I have lived here my entire adult life after living in Europe in the early 60’s, the Far East in the early and mid 70’s and all over the states between. That saying is quite true. But this winter that shut much of the state down took the cake and tossed it out the window. In my household we were fortunate in that we had power but no water. Many did not have either. I had to get my 96 year old father in law as he had no power or water and his house was cooling rapidly with the temp outside at ~20 f. with 2 feet of snow and ice on the ground in central Texas. Fortunately I have a 4 wheel drive vehicle. The high wind had drifted the snow to 4 feet on the empty highway. When I left to get him I didn’t know if I would make it. I was not scared, but worried about my family and just kept moving forward. I have lived through blizzard in a tent In Yosemite where I worked at the ski lodge. But this was bizarre. 2 inches of snow once every couple of years, yes but 2-4 feet with ice and high wind not in Austin. We had to collect snow and ice for the better part of the week for toilet and dishwashing. Then we had to boil the water for several days when it came back on. And we were the lucky ones. Sorry that got long quick.
@@Claytone-Records that's so interesting to hear from someone who went through that. It's better than getting it from the news. Hope everything settles down now and you can get some sunny vitimin d. All the best from England. 🏴🇺🇲
Fred Chapman, Hi there, Fred. I was on the roof clearing branches and wet leaves off today for 3 hours, but will still take my D3. We have many huge trees in Austin and it is not very much like the rest of what people think of Texas in many ways. It is one of the greenest cities in the country. And that winter storm brought a lot of trees down. Huge trees come down everywhere, on houses, block streets. We first had an ice storm that coated every exposed surface. Then the wind came and the branches and huge oaks started falling and then power lines started outages the first night with the thick ice. Saturday the snow started with more wind and ice Sunday. Monday most of the State was shut down and nobody went to work for most of the week. Austin, Houston, Dallas and hundreds of small towns started losing power that first night with the ice. I have lived on a small island for five years and we would get hit by a couple powerful typhoons every typhoon season. I have forgotten most of them, but I and my family and many thousands actually millions will never forget about this winter. We are grateful to be able to tell the tale.
Very interesting and sounds like a good reason to continue masking etc..
Primary doctor medical journal, peer reviewed, say masks are neither safe or effective, why are you not listening.
good reason to continue masking etc..
Yes, no time to let our guard down.
@@pandemichackingchannel9791 Who is guarding the guards ? When is the time to let the guards down?
@@sleepsmartsmashstress740 I'm not sure I understand your comment. I mean that a lot of people are so sick and tired of the whole situation that the longing to get back to normal is strong. Understandable but not warranted by the situation in my opinion.
Excellent teaching, thank you.
Wonderful lesson on mutation, can’t wait to show this to my 15 yr old granddaughter, perfect timing for her biology studies.
RNA, amino acids, peptides, proteins, .....and a coffee, please.😊
Would you like starch, vegetable oil and salt with that? 🍟
@@timothy8428 😆
Grreat job. You made it interesting and understandable.
So what's Dr Bossche on about?
When you feel better (get well soon!) can you do a video about all of the new virus variants that we know about (UK/B117, S.Africa, Brazil, I think there's a couple US variants now)?
Thanks again for an informative tutorial, Dr Campbell