that crashed today just it and realize that it has happened let's get more on that i'm joined by derek williams from d.w. science here in the studio derek was the surprise it wasn't a surprise it's for one of the 1st times ever since i've been reporting on this it wasn't a surprise these these 2 researchers are kind of rock stars and in the science world because this discovery that they made really only 8 years ago has really changed completely changed the landscape and in a huge range of fields ranging from from from what we understand about how genes work so basic fundamental research to the cancer research to genetically modifying plants it's had it's made all of those things possible and so it's not surprising in the least in fact i think they probably would have gotten it earlier if not for the fact that there's been an ongoing sort of patent battle and patent battle and with another group where dolly knows sort of famously said well you know we discovered tennis balls and they discovered green tennis balls and and actually i think that the nobel committee has sent a signal by only honorin

science correspondent derek williams that you got a question for him you kind of course submit one through. channel and that was your call that 19 special thanks for joining us as more information on our website just go to detail we dot com and click on coronavirus at the top of the page for me on the team thanks a lot for watching. them. into the conflict zone. there's turmoil to say with mounting demonstrations against the prime minister fused of corruption and mishandling the spiraling health crisis my guest this week in jerusalem is nearby former mayor of the city the leading politician mr netanyahu says he could fancy all the wheels finally coming off the prime minister's wife conflicts of. grappling with some tricks. to express her feelings i am not very creative yet but i would love to be considered an artist one day looking for new perspectives on the door and not to be replaced brake revealed candidate doing things differently. come to the place where we reflect on society constantly. coupon teetotal. it was the 1st international tribunal in history. the nurnberg trials. of 75 yea

science correspondent derek williams that if you got a question for him you kind of course submit one through your channel and that was you'll call that 19 special thanks for joining us as more information on our website just go to do we don't come to you click on coronavirus at the top of the page for me on the team thanks a lot for watching. for traders sitting fancy offices for decades they systematically deceived the german state did nobody notice. comics is the perfect crime in one innocent 10 pence time. until one person started uncovering it. journalist on the bush team in dealing. with 1000000000 euro tax scandal. in 15 minutes on g.w. . form or. where i come from we have to fight for a free press and was born and raised in a military the danger ship with just one t.v. shadow and if you just pay for us with official information as a journalist i have walked off the streets of many can trust and their problems are always the same or do the social inequality a lack of the freedom of the press and corruption we can afford to stay silent when it comes to the fans and the humans on

science correspondent derek williams. what about long term competitions where we seek over 1000 disabilities in the future. doctors are especially worried about the impact of heart damage in patients tissue death and storing there is permanence and poses lifelong health issues we'll obviously only know the long term effects of covert 99 survivors when much more time has passed but there are already indicators that those effects will be significant the doctor who treated british prime minister boris johnson last spring paul the disease this generation's polio it's a sobering prediction that implies that he at least expects long term disability related to covert 19 to grow common and lots of other experts agree with them. and you'll know how badly the corona virus has affected impacted the tourism industry but many travelers did and still find themselves stranded far from home when that pandemic hit earlier this year including the japanese tourist in peru back in ma jesse takayama order to get to see the world renowned ruin

now it's time for viewer questions it's the part of the show where our science correspondent derek williams answers the questions you've posed that tore you tube channel over there. if a number of vaccines come out of the same time would it homy to take multiple different vaccines. in light of how quickly things are moving on the vaccine from this is an important question to ask for example there have been reports that china is apparently already giving tens of thousands of doses to people there of vaccine candidates that haven't yet completed widespread safety and efficacy testing observers are seriously alarmed by that because it sets the stage for a range of frightening possible scenarios what happens for instance if the vaccine doesn't prevent infection as well as hoped and and those people have to be vaccinated again at some point with other candidates could that be dangerous for them the short answer is once again we don't know but possibly vaccines can have adverse effects even when just one is administered that's why they're tested so widely before being approved for the general pub

well derek williams their answer in one of your questions and he'll be back again tomorrow so keep posting your questions on our you tube channel and if you'd like to keep up with the latest developments on the. do subscribe to our newsletter just log on to the dot com slash corona dash this letter. and i was 19 special for today for me and the team in berlin thanks for giving us company to stay safe and healthy. 3 now see adornment wipe out shall pass. after the revered army the while blues are now months without when. 5. f.c. firearms team roll i'm tough frankford as long as i have an oscar she gets a new player in this league and referees chipped off. the 35 w. . nico because in germany to learn german english cynical why not learn with him d w z learning course because vic. what's going on here. the house of your very own from a printer. computer games that are healing. my dog needs electricity. shift explains delivers facts and shows what the future holds. living in the digital world shifts. on d w. 100 small feeds in my hands. where i come from raji order means an important soft tran

humanity and this falls sort of squarely in that category absolutely fascinating graduations to them derek williamsfrom thank you. note for you now the legendary rock a taurus and songwriter eddie van halen has died after a long battle with cancer together with his brother alex in 1972 he formed the band that later became van halen 10 years after their family emigrated from the netherlands to pasadena california and hal and became one of the world's top selling bands with songs like. 30000 hayden was born in amsterdam in 955 and he moved with his family to los angeles in the early 1960 s. he started life as a musician at the piano but later switched his ambitions to the guitar the rest is history and his older brother ehrlich's from hayden in the 1970 s. they had a distinctive style and it is that infamous guitar solos and from dave the votes flamboyant taken the wrong. they appeal to people from old age groups. younger fans don't even know we have 11 other records i saw with fire if we give a taste of each one which one they want to buy. so it's not for the money because every $1.00 of the money w

and now it's time for your questions it's the part of the show where our science correspondent derek williams answers the questions you posted to you tube channel over there. how long does an asymptomatic person or one who has overcome cope at 19 remain a possible source of infection. regardless of whether you have symptoms or if you're asymptomatic if you've been diagnosed with coke at 19 it's important not to leave isolation until your local health authority says you no longer pose a danger to others and it's recommended guidelines the w.h.o. says that on average positive patients who show symptoms could be infectious for up to 10 days after symptoms 1st appear it also says patients should wait at least that long plus 3 days after they're symptom free without any medication so a person with an average case of coke at 19 if there is such a thing should isolate a minimum of 13 days for asymptomatic people the w.h.o. recommendation is to isolate for at least 10 days since your last positive test various national health authorities have interpreted those recommendations in different ways there

of to our science correspondent now derek williams for another book shelf installment of his q. and a the usa it's. how do you make a vaccine for something that mutates. i get asked this a lot to answer we have to look at the process of evolution not just like with living organisms the genetic code that governs how a virus is made changes from generation to generation sometimes in small ways sometimes in big ones the progeny if they survive eventually will become separate strains that are distinct from their common ancestor their genetic code has changed and and that can change how they look at their structure and also how they interact with potential hosts for example whether they can cause more or less severe illness what's key to creating a vaccine is the speed at which these changes occur in viruses like the ones that cause influenza for example which have genomes that are less stable or the rate of change is so rapid and random that we need a new vaccine to fight them every year we have to play catch up with flu bugs all the time fortunately due to the way that sars 2 makes

of to our science correspondent now derek williams for another book shelf installment of his q. and a the usa. how do you make a vaccine for something that mutates. i get asked this a lot to answer we have to look at the process of evolution not just like with living organisms the genetic code that governs how a virus is made changes from generation to generation sometimes in small ways sometimes in big ones the progeny if they survive eventually will become separate strains that are distinct from their common ancestor their genetic code has changed and and that can change how they look at their structure and also how they interact with potential hosts for example whether they can cause more or less severe illness what's key to creating a vaccine is the speed at which these changes occur in viruses like the ones that cause influenza for example which have genomes that are less stable or the rate of change is so rapid and random that we need a new vaccine to fight them every year we have to play catch up with flu bugs all the time fortunately due to the way that sars 2 makes copi

well our science correspondent derek williams has been busy looking into your questions about the pandemic over now to derek. many of the social controls put in place are based on asymptomatic transmission what evidence is there for such a phenomenon. do people who are asymptomatic transmit source code to to others and if so then how infectious are they this is been one of those issues that's proven they're a difficult to come to grips with in the course of this pandemic for for a couple of reasons 1st of all because we only really recently began to detect asymptomatic people on a wide scale seconds because today's asymptomatic patient can turn out to be only present and not and start showing symptoms tomorrow and we're pretty sure that presumptive medic carriers can be highly infectious 3rd because the viral load and asymptomatic patient carries is usually very similar to that of someone showing symptoms so so what evidence is there that people who test positive for covert 19 but don't ever develop symptoms how likely is it that they can infect others. a pre-print paper set for publicatio

well derek williams there in one of your questions and he'll be back again tomorrow so keep posting your questions on our you tube channel and if you'd like to keep up with the latest developments on the. do subscribe to our newsletter just log on to. dash it's letter. and i was 19 special for today for me and the team in berlin thanks for giving us company to stay safe and healthy. next year president. the german economy is in closely. there's so much change. like one exactly. made in germany. in 30 minutes on d w. o africa. a boost in digitalization in the pandemic. and online payment system has got rwanda's motorcycle taxis back on the road after a month's non driving ban. now the customers pay for the ride without cash. for good. 90 minutes on the. board. or. we can start rewriting the software of sample bacterial cells. were not be a big life threat we're rewriting the program for all the software or read all of our selves we can redesign them they'll have different properties i don't have a clue were all that important changing the a bit 0 as a top of the appropriate could give us

'd and now it's time for our question over to our science correspondent derek williams. once dangerous is the pneumonia why not find a cure or treatment for the pneumonia instead of the virus. pneumonia is a blanket term that's generally defined as a more or less serious inflammation of tissue in your air passages and or your lungs it can be caused by a number of different pathogens both both viral and bacterial pneumonia that cove in $1000.00 can cause is generally initiated by the virus and can't be treated for example with antibiotics which only kill bacteria when they're infected with source code to the cells in the small sacs in their lungs where gas exchange occurs what are called the alveoli begin to die and clog the lungs up and that can eventually lead to what's called acute respiratory distress syndrome as the pneumonia progresses the situation can be exacerbated by the immune system causing massive inflammation which is which is supposed to help get the infection under control but which can actually make things worse so so treating or curing coronavirus pneumo

well derek williams their answer in one of your questions and he'll be back again tomorrow so keep posting your questions on our you tube channel and if you'd like to keep up with the latest developments on the coronavirus to subscribe to our newsletter just log on to d.w. dot com slash corona dash is letter. and i was 19 special for today for me and the team in berlin thanks for giving us company to stay safe and healthy. eco africa. in digitalization in the pandemic. and online payment system has gone from wonders motorcycle taxis back on the road after a months long drive back. now the customers pay for the ride without cash. for go. next to. find a new says trying to. be the next president. of the german economy is your reaction closely. there's i'm not saying. what exactly. made in germany. in 60 minutes on d w. why did this person. there are. there is a mosque that can be done. make up your body. double. what do animal conservation groups did jump payment systems on a gun and are just having problems well believe it or not they can help to protect them very much more on that coming u

derek williams turn to take the reins science correspondent has been busy looking into your questions about the pandemic. once dangerous is the pneumonia why not find a cure or treatment for the new manuf instead of the virus pneumonia is a blanket term that's generally defined as a more or less serious inflammation of tissue in your air passages and or your lungs it can be caused by a number of different pathogens both both viral and bacterial pneumonia that cove in 1000 can cause is generally initiated by the virus and can't be treated for example with antibiotics which only kill bacteria when they're infected with source code to the cells in the small sacks in their lawns where gas exchange occurs what are called the alveoli begin to die and clog the lungs up and that can eventually lead to what's called acute respiratory distress syndrome as the pneumonia progresses the situation can be exacerbated by the immune system causing massive inflammation which is which is supposed to help get infection under control but which can actually make things worse so so treating or curing corona

and now it's time for your questions it's the part of the show where our science correspondent derek williams answers the questions you've posed that tore you tube channel over there. if a number of vaccines come out of the same time would it homy to take multiple different vaccines. in light of how quickly things are moving on the vaccine front this is an important question and for example there have been reports that china is apparently already giving tens of thousands of doses to people there of vaccine candidates that haven't yet completed widespread safety and efficacy testing observers are seriously alarmed by that because it sets the stage for a range of frightening possible scenarios what happens for instance if the vaccine doesn't prevent infection as well as hoped and and those people have to be vaccinated again at some point with other candidates could that be dangerous for them the short answer is once again we don't know but possibly vaccines can have adverse effects even when just one is administered that's why they're tested so widely before being approved for the general publi

and let me hand you over to derek williams who's been busy researching answers to your questions on the correct advice. what if no vaccine is successful what would be the powerful what the speed at which vaccines are being developed for covert 19 is breathtaking and there are over $150.00 of them in trials of some sort with with dozens of them in testing in humans and though that might seem like overkill it's not that's because under normal circumstances where development takes many years less than 10 percent of vaccine candidates for other diseases and up receiving approval so blots of the ones aimed at covert 19 are not going to work out almost certainly the majority but but what happens if none of them do it's a scary scenario and it's one that most experts don't consider likely but i suppose it's certainly a possibility so let's look for a 2nd and what that would mean if a vaccine remains elusive will have to continue to try to fight the virus by helping and healing the people who become infected with treatments like newly developed or repurposed drugs that improve outcomes there ar

science correspondent derek williams that you got a question for you kind of course submit one through. channel and that was your call that 19 special thanks for joining us as more information on our website just go to do we dot com and click on coronavirus at the top of the page for me on the team thanks a lot for watching. one continent. 700000000 people. with their own time. personal stories. we explore every day life for. what europeans fear and what they hope for. some kids under. 30 minutes on d w. into the conflict zone. there's turmoil news read with mounting demonstrations against the prime minister queues the corruption and mishandling the starving health crisis by this week in jerusalem is near the top that former mayor of the city the leading politician mr netanyahu speaks to party all the use finally coming off the prime minister's wife. looks. 90 minutes to dublin. this presidential election is a crucial why not just for the united states who's leading the race in america is going to come with a bloody price here for you and both how you everything you need to know as ame

and now it's time for your questions it's the part of the show where our science correspondent derek williams as the questions you've posted are you tube channel or did there. just covert 19 transmission change depending on whether it's you know that or fatah try one of the great hopes last winter here in the northern hemisphere back in february and march that covert 1000 would prove to be seasonal hasn't hasn't really panned out and in the last months a lot of researchers have come out with with often conflicting messages about about where and how environmental factors are influencing the spread of the disease any direct links between al gore temperatures and transmission of the virus seem to still be pretty pretty tenuous to me but increasingly researchers are coming to a more united conclusion that the humidity the amount of moisture in the air could be playing a pretty big role in the spread of sars co 2 both indoors and out in the evidence is mounting that dry air makes the virus spread more rapidly one new study out of australia claims that when relative humidity falls just one percent

well derek williams there on spring one of your questions and he'll be back again tomorrow so keep postingyour questions on our you tube channel and if you'd like to keep up with the latest developments on the coronavirus to subscribe to our newsletter just log on to the dot com slash corona dash this letter. and i was 19 special for today for me and the team in berlin thanks for giving us company stay safe and healthy. happiness is for everyone shimming penises are very different from primates we have a totally ridiculous a man sized view of nature and their favorite and this is climate change crisis sex how freeness improves books you get smarter for free did always works. we're all set. to go beyond obvious. to live. as we take on the world. we're all about the stories that matter to you country. what ever it tastes not running now from nothing. nothing. you made for mines. this is state of the news africa coming up on the program alleged killings on a crackdown on the opposition stands and he ends brace for presidential elections on wednesday so one does not speak 1st and so i go fully

and let me hand you over to derek williams who's been busy researching answers to your questions on the correct advice. what if no vaccine is successful what would be the powerful what the speed at which vaccines are being developed for covert 19 is breathtaking and there are over $150.00 of them in trials of some sort with with dozens of them in testing in humans and though that might seem like overkill it's not that's because under normal circumstances where development takes many years less than 10 percent of vaccine candidates for other diseases and up receiving approval so blots of the ones aimed at covert 19 not going to work out almost certainly the majority but what happens if none of them do it's a scary scenario and it's one that most experts don't consider likely but i suppose it's certainly a possibility so let's look for a 2nd and what that would mean if a vaccine remains elusive will have to continue to try to fight the virus by helping and healing the people who become infected with treatments like newly developed or repurposed drugs that improve outcomes there are still

and now it's time for your questions it's the part of the show where our science correspondent derek williams as the questions you've posted to you tube channel were to do. just covert 1000 transmission change depending on whether it's in that or fatah try one of the great hopes last winter here in the northern hemisphere back in february and march that cove in 1000 would prove to be seasonal hasn't hasn't really panned out and then the last months a lot of researchers have come out with with often conflicting messages about about where and how environmental factors are influencing the spread of the disease any direct links between the war temperatures and transmission of the virus seem to still be pretty pretty tenuous to me but increasingly researchers are coming to a more united conclusion that the humidity the amount of moisture in the air could be playing a pretty big role in the spread of sars to both both indoors and out in the evidence is mounting that dry air makes the virus spread more rapidly one new study out of australia claims that when relative humidity falls just one percent i

and now it's time for your questions it's the part of the show where our science correspondent derek williams answers the questions you've posed that tore you tube channel over there. if a number of vaccines come out of the same time would it homy to take multiple different vaccines. in light of how quickly things are moving on the vaccine front this is an important question to ask for example there have been reports that china is apparently already giving tens of thousands of doses to people there of vaccine candidates that haven't yet completed widespread safety and efficacy testing observers are seriously alarmed by that because it sets the stage for a range of frightening possible scenarios what happens for instance if the vaccine doesn't prevent infection as well as hoped and and those people have to be vaccinated again at some point with other candidates could that be dangerous for them the short answer is once again we don't know but possibly vaccines can have adverse effects even when just one is administered that's why they're tested so widely before being approved for the general pu

science correspondent derek williams that you got a question for you kind of course submit one through how you choose a channel and that was your call that 19 special thanks for joining us as more information on our website just go to do we dot com and click on coronavirus of the top of the page for me i'm a teen thanks a lot for watching. i'm not laughing at. well i guess sometimes i am but i stand up and with the kind of unthinking printer jamming. you did seem to keep his grandmother to you because it's all about who you know i'm rachel join me for me to get funky of course. and you hear me known here as years we can hear you and how the last 2 years gentlemen sound so now we bring you i'm going to man call as you've never before surprise yourself with what is possible who is magical really what moves. who talks to people who follow along the way admirers and critics alike how is the world's most powerful woman shaping public and joining us from apple's last box. this is. coming up on the program it's being called. cruelty cameroonians devastated after a tar case carried out. after

heard from monica gandhi thank you very much for being on this earth day 8 here and now it's derek williams chance to answer your questions on the coronavirus if you want to look into something in particular just write to us on out huge of china. if i free coverage from code 19 do i still have to wear a mask. sometimes it's easy to forget that millions and millions of people worldwide have also recovered from cope at 19 and want to return as much as possible until life as usual but what does coming out the other end mean are you safe from the disease because you're immune can you still pose a potential danger to others do you need to continue to social distance and wear a mask it's all questions that we still don't have a firm answers to we just have to guess and rely on what we know from other infectious diseases particularly those caused by other coronaviruses based on what we've seen so far with hope at 19 people do acquire some immunity the problem is we don't know for how long on average but we do know is that with other coronaviruses that infect humans immunity can wane pretty swiftly

and now it's time for your questions it's the part of the show where our science correspondent derek williams answers the questions you posted to you tube channel or derrick. how long does an asymptomatic person or one who has overcome covet 19 remain a possible source of infection. regardless of whether you have symptoms or if you're asymptomatic if you've been diagnosed with coke at 19 it's important not to leave isolation until your local health authority says you no longer pose a danger to others and it's recommended guidelines the w.h.o. says that on average positive patients who show symptoms could be infectious for up to 10 days after symptoms 1st appear it also says patients should wait at least that long plus 3 days after they're symptom free without any medication so a person with an average case of coke at 19 if there is such a thing should isolate a minimum of 13 days for asymptomatic people the w.h.o. recommendation is to isolate for at least 10 days since your last positive test various national health authorities have interpreted those recommendations in different ways there is

now it's time for viewer questions it's the part of the show where our science correspondent derek williams answers the questions you've posed that tore you tube channel over there. if a number of vaccines come out of the same time would it homy to take multiple different vaccines. in light of how quickly things are moving on the vaccine from this is an important question to ask for example there have been reports that china is apparently already giving tens of thousands of doses to people there of vaccine candidates that haven't yet completed widespread safety and efficacy testing observers are seriously alarmed by that because it sets the stage for a range of frightening possible scenarios what happens for instance if the vaccine doesn't prevent infection as well as hoped and and those people have to be vaccinated again at some point with other candidates could that be dangerous for them the short answer is once again we don't know but possibly vaccines can have adverse effects even when just one is administered that's why they're tested so widely before being approved for the general pub

science correspondent derek williams that you got a question for you kind of course submit one through how you tube channel and that was your call that 19 special thanks for joining us as more information on our web site just go to do we dot com and click on coronavirus at the top of the page for me i'm a teen thanks a lot for watching. please . find in the news is trying to. be the next president. to german economy is your issue closely. there's no money. what exactly. made in germany. 90 minutes on d w. actually written returns just shows the numbers for france shows. the menus in the form. the law. of large ways to get for your good. read. on. why are people forced to hide in trucks. there are many reasons. and there are many answers. and there are many stories. make up your own. plane. made for minds. it's their absentia for spectacular pictures. it's their passion for nature. it's their complete devotion that makes them the best wildlife photographers in the world. fascinating. and. confrontational and stirring. 5 adventures. one goal. the preservation of our planet. it's goddess

over to our science correspondent now derek williams for another bookshelf installment of his q. and a viewer said it's. how do you make a vaccine for something that mutates. i get asked this a lot to answer we have to look at the process of evolution not just like with living organisms the genetic code that governs how a virus is made changes from generation to generation sometimes in small ways sometimes in big ones the progeny if they survive eventually will become separate strains that are distinct from their common ancestor their genetic code has changed and and that can change how they look at their structure and also how they interact with potential hosts for example whether they can cause more or less severe illness what's key to creating a vaccine is the speed at which these changes occur in viruses like the ones that cause influenza for example which have genomes that are less stable or the rate of change is so rapid and random that we need a new vaccine to fight them every year we have to play catch up with flu bugs all the time fortunately due to the way that sars mak

well derek williams there on spring one of your questions and he'll be back again tomorrow so keep posting your questions on our you tube channel and if you'd like to keep up with the latest developments on the coronavirus to subscribe to our newsletter just log on to t w dot com slash corona dash this letter. and i was 19 special for today for me and the team in berlin thanks for giving us company stay safe and healthy. kids. 3 now see a dog can wipe out shell. after the revered davido while police are now 9 months without when. i think they. see byron steve carroll. cranford's mamas live in dosti ships a new plane this legal records. to go. to mexico many polish muslims are thrown out of the water right now climate change event off the story. faces much less than when photos one week. how much worse can really get. we still have time to act i'm going. to sort of set. it subscribe like this. beethoven is for me. it's for you. beethoven as for hell. beethoven is for. beethoven it is for the. beethoven is for us. beethoven is for. beethoven 2020 the 250th anniversary here on deal here. some

and let me hand you over to derek williams who's been busy researching answers to your questions on the correct device. what if a new vaccine is successful what would be the power full at the speed at which vaccines are being developed for coated 19 is breathtaking and there are over $150.00 of them in trials of some sort with with dozens of them in testing in humans and though that might seem like overkill it's not that's because under normal circumstances where development takes many years less than 10 percent of vaccine candidates for other diseases and up receiving approval so blots of the ones aimed at covert 19 not going to work out almost certainly the majority but but what happens if none of them do it's a scary scenario and it's one that most experts don't consider life with but i suppose it's certainly a possibility so let's look for a 2nd and what that would mean if a vaccine remains elusive we'll have to continue to try to fight the virus by helping and healing the people who become infected with treatments like newly developed or repurposed drugs that improve outcomes there

now it's time for viewer questions it's the part of the show where our science correspondent derek williams answers the questions you've posed that tore you tube channel over there. if a number of vaccines come out of the same time would it homy to take multiple different vaccines. in light of how quickly things are moving on the vaccine from this is an important question to ask for example there have been reports that china is apparently already giving tens of thousands of doses to people there of vaccine candidates that haven't yet completed widespread safety and efficacy testing observers are seriously alarmed by that because it sets the stage for a range of frightening possible scenarios what happens for instance if the vaccine doesn't prevent infection as well as hoped and and those people have to be vaccinated again at some point with other candidates could that be dangerous for them the short answer is once again we don't know but possibly vaccines can have adverse effects even when just one is administered that's why they're tested so widely before being approved for the general pub

and let me hand you over to derek williams who's been busy researching answers to your questions on the coronavirus. what if no vaccine is successful what would be the powerful what the speed at which vaccines are being developed for covert 19 is breathtaking and there are over $150.00 of them in trials of some sort with with dozens of them in testing in humans and though that might seem like overkill it's not that's because under normal circumstances where development takes many years less than 10 percent of vaccine candidates for other diseases and up receiving approval so blocks of the ones aimed at 19 but are not going to work out almost certainly the majority but what happens if none of them do it's a scary scenario and it's one that most experts don't consider likely but i suppose it's certainly a possibility so let's look for a 2nd and what that would mean if a vaccine remains elusive we'll have to continue to try to fight the virus by helping and healing the people who become infected with treatments like newly developed or repurposed drugs that improve outcomes there are still

i know it's time for your questions it's the part of the show where our science correspondent derek williams answers the questions you posted to you tube channel or derek. how long does an asymptomatic person or one who has overcome cope at 19 remain a possible source of infection. regardless of whether you have symptoms or if you're asymptomatic if you've been diagnosed with coke at 19 it's important not to leave isolation until your local health authority says you no longer pose a danger to others and it's recommended guidelines that w.h.o. says that on average positive patients who show symptoms could be infectious for up to 10 days after symptoms 1st appeared it also says patients should wait at least that long plus 3 days after their symptom free without any medication so a person with an average case of coke at 19 if there is such a thing should isolate a minimum of 13 days for asymptomatic people the w.h.o. recommendation is to isolate for at least 10 days since your last positive test various national health authorities have interpreted those recommendations in different ways there i

and now it's time for your questions it's the part of the show where our science correspondent derek williams as the questions you've posted to our you tube channel were to do. just covert 1000 transmission change depending on whether it's in that or fatah try one of the great hopes last winter here in the northern hemisphere back in february and march that covert 1000 would prove to be seasonal hasn't hasn't really panned out and in the last months a lot of researchers have come out with with often conflicting messages about about where and how environmental factors are influencing the spread of the disease any direct links between the war temperatures and transmission of the virus seem to still be pretty pretty tenuous to me but increasingly researchers are coming to a more united conclusion that the humidity the amount of moisture in the air could be playing a pretty big role in the spread of sars code to both those indoors and out in the evidence is mounting that dry air makes the virus spread more rapidly one new study out of australia claims that when relative humidity falls just one pe

over to our science correspondent now derek williams for another book shelf installment of his q. and a viewers say it's. how do you make a vaccine for something that mutates. i get asked this a lot to answer we have to look at the process of evolution not just like with living organisms the genetic code that governs how a virus is made changes from generation to generation sometimes in small ways sometimes in big ones the progeny if they survive eventually will become separate strains that are distinct from their common ancestor their genetic code has changed and and that can change how they look at their structure and also how they interact with potential hosts for example whether they can cause more or less severe illness what's key to creating a vaccine is the speed at which these changes occur in viruses like the ones that cause influenza for example which have genomes that are less stable or the rate of change is so rapid and random that we need a new vaccine to fight them every year we have to play catch up with flu bugs all the time fortunately due to the way that sars cov

and this falls sort of squarely in that category absolutely fascinating congratulations to them derek williams from thank you. france has recorded more than 11000 new coronavirus cases in a single day as it continues to try and curb an alarming number of fresh infections the country imposed one of europe's strictest lockdowns in the spring and has since frampton testing but that hasn't stopped the onset of a 2nd wave. lunchtime. in the era of coronavirus the last time m.f. n e had fries she shared them with a friend who later tested positive for 19 and then ventured temporary testing center close to university here in surgery not far from paris but she never received her results it was annoying because over of my friends were meeting i'd like apartments sign anything to just like leave and i couldn't even go to the school to look at them because physically when i cool so it was with the like but we'll just stay home and do nothing but. i think you have to go through that so it's not usual for test results to get lost in france but waiting for them isn't unusual recently people here often had t

derek williams turn to take the reins science correspondent has been busy looking into your questions about the pandemic. once dangerous is the pneumonia why not find a cure or treatment for the knee manuf instead of the virus. pneumonia is a blanket term that's generally defined as a more or less serious inflammation of tissue in your air passages and or your lawn it can be caused by a number of different pathogens both both viral and bacterial pneumonia that cove in $1000.00 can cause is generally initiated by the virus and can't be treated for example with antibiotics which only kill bacteria when they're infected with source code to the cells in the small sacks in their lawns where gas exchange occurs what are called the alveoli begin to die and clog the lungs up and that can eventually lead to what's called an acute respiratory distress syndrome as the pneumonia progresses the situation can be exacerbated by the immune system causing massive inflammation which is which is supposed to help get the infection under control but which can actually make things worse so so treating more

with in the future and this is very very important scientific research it deserves the prize derek williams from to science thank you. well there are mixed messages coming from washington after u.s. president donald trump briefly left the hospital where he's being treated for covert 19 he took a motorcade to greet supporters outside in a move that appeared at odds with protocols for patients with covert 19 while his medics say that he could be well enough to be discharged on monday other physicians have their doubts. president trump alive and well appear to be the message behind his short right outside the walter reed military hospital where he's being treated for a cold that 19 the wisdom of his outing to greet supporters was immediately questioned leading physician said president trump disregarded standard guidelines for coronavirus patients and put the health of others at risk. in a short video posted on sunday trump claimed that this experience was teaching him a lot about the coronavirus anybody so it's been a very interesting journey i learned a lot about kovi i learned it by really g

now it's time for viewer questions it's the part of the show where our science correspondent derek williams answers the questions you've posed that tore you tube channel over there. if a number of vaccines come out of the same time would it homy to take multiple different vaccines. in light of how quickly things are moving on the vaccine from this is an important question to ask for example there have been reports that china is apparently already giving tens of thousands of doses to people there of vaccine candidates that haven't yet completed widespread safety and efficacy testing observers are seriously alarmed by that because it sets the stage for a range of frightening possible scenarios what happens for instance if the vaccine doesn't prevent infection as well as hoped and and those people have to be vaccinated again at some point with other candidates could that be dangerous for them the short answer is once again we don't know but possibly vaccines can have adverse effects even when just one is administered that's why they're tested so widely before being approved for the general pub

with in the future and this is a very very important scientific research it deserves the prize derek williams from science thank you. there are mixed messages coming from washington after u.s. president donald trump briefly left the hospital where he is being treated for kovan 19 he took a motorcade to greet supporters outside in a move that appeared at odds with protocols for patients with covert 19 now while his medics say he could be well enough to be discharged on monday other physicians have their doubts. president trump alive and well appeared to be the message behind his short right outside the walter reed military hospital where he's being treated for a cold that 19 the wisdom of his outing to greet supporters was immediately questioned leading physician said president trump disregarded standard guidelines for corona virus patients and put the health of others at risk. in a short video posted on sunday trump claimed that this experience was teaching him a lot about the coronavirus anybody so it's been a very interesting journey i learned a lot about kovi i learned it by really going t

the questions all you have to do is send them to our you tube channel a science correspondent derek williams will do the rest. can you tell us more about. how long the fire risk remains infectious on surfaces. phone lines are objects that are contaminated by a sick person that can pass an infectious pathogen along to others are thinking about them in the current pandemic has evolved a lot since the beginning of the year and experts say the w.h.o. and and other health authorities now say that phone lines play at most a secondary role in that in the spread of covert 19 and the general consensus is that that surface transmission might be possible but is likely pretty uncommon however a few weeks ago when new study came out of australia that's drawn attention back to the question of how much danger foam mites might potentially pose so let's take a look at it this study so to show what effects the different temperatures have on viral viability on various surfaces over time and the result that raised eyebrows was that at 20 degrees celsius the researchers detected potentially infectious virus on s

well derek williams there on spring one of your questions and he'll be back again tomorrow so keep posting your questions on our you tube channel and if you'd like to keep up with the latest developments on the coronavirus to subscribe to our newsletter just log on to d w dot com slash corona dash this letter. and i was 19 special for today for me and the team in berlin thanks for keeping us company stay safe and healthy. because. the e-mail lucy enjoyment my pal shall come. after the revered army the mild blues are now months without them when. i. see byron steamroll i'm tough trying for thomas levin dosti should say this legal record. should go. to. new york here's me going to you and my last year's judgement sauce i want to bring you an angle a mouthful and you've never caught our surprise yourself with god it's possible until this magical what a loser. who talks of people who follow along the way maurice and critics alike join us from arkansas stops. every jew you can see for us and for our planet. global ideas is on its way to bring you more conservation law to me makes it scream. how