leaders want to raise more than 7000000000 dollars loss and is director of the vaccine confidence project at the london school of hygiene and tropical medicine joins me now via skype from london good to have you with a scan on the program quite a successful day really at this conference in london we're getting news of the german chancellor having pledge 600000000 euros to the appeal hello heidi can you hear me in london heidi lawson. yes yes heidi it's good to have you with us again i just was saying that the german chancellor has pledged 600000000 euros to the pledging conference it seems to be in quite a good day i think it it's been a very good day. for the. for the mission. it's really been in fact i have i've been i expected it to be generous but it's been better than i expected because given the situation we're in with the global economy and all the issues it's really it's very moving how difficult has it been really do you think for people in your position to try and encourage government's authority as even as a local level to try and help support this considering as you say we're dealing with a huge economic. fallout and problem glob

90% of them did not wear face coverings, and they were very close to each other, and we do know that, you know, this virus according to research from the london school of hygiene and tropical medicine may have a dispersion factor or what we call a k factor which is very high. that means 10% of people who are 80% of the viral spread. it really is very concerning, and that's why we really are trying to make sure people don't go to crowded arenas. >> comedian d.l. hughley was performing over the weekend. i'm sure you saw when he collapsed on a stage in nashville. he was treated for exhaustion and dehydration and then tested positive for covid-19. he says he's asymptomatic. no fever, no cough. hughley is going to quarantine in his hotel in nashville for 14 days. most are assuming this morning that collapse was linked to the virus. would that be correct? >> it's hard to say. i have personally treated patients who did not exhibit the particular classic symptoms of shortness of breath. you know, just simple fatigue and lack of appetite was just enough for me to trigger a covid test to find that they were positive. but also the sodium and potassium and other electrolytes which are controll

scientists and business leaders call on the government to ditch its covert 19 travel quarantine system professor peter peel it's the director of the london school of hygiene and tropical medicine says it's completely useless and should be dropped as soon as possible experts say the blanket restrictions which forced all arrivals to quarantine for 14 days would only have been successful at the very start of the pandemic well the former director of the w.h.o. counsel program professor carol sykora told me that quarantine only makes sense for arrivals from places with higher infection rates than the u.k. . i think you know words at the critical moment in unleashing lockdown and the 2 things that we need to do is to reduce the distance that we can safely stand away from each other from 2 metres to what i think is a sensible $11.00 we should that's what the government show recommends and then get rid of the quarantine that there's no point the other countries in europe have a lower coronavirus incidence rate than we do so it makes no sense to quarantine people coming for a lower area now if you take latin america some of those countries are still quite high and that would make sense

scientists and business leaders call on the government to ditch its covert 19 travel quarantine system professor peter p.s. the director of the london school of hygiene and tropical medicine says it's completely useless and should be dropped to soon as possible the experts say the blanket restrictions which forced all arrivals to quarantine for 14 days would only have been successful at the very start of the pandemic. all the moralists i'm joined by the former director of the w.h.a. council program that's professor carroll sykora reza get sick or thank you for joining us i mean it does make sense to quarantine arrivals now because the u.k.'s infection rates are lower than other countries raising fears of more important cases is that the case. yes i think you know we're so it's a critical moment in unleashing a lockdown on the 2 things that we need to do is to reduce the distance that we can safely stand away from each other from 2 meters to what i think is a sensible $11.00 we should that's what the government show recommends and then get rid of the corn that there's no point the other countries in europe have a lower coronavirus incidence rate than we do so it makes no s

scientists and business leaders call on the government to ditch its coded 19 travel quarantine system professor peter pirit the director of the london school of hygiene and tropical medicine says it's completely useless and should be dropped as soon as possible experts say the blanket restrictions which forced all arrivals to quarantine for 14 days would only have been successful at the very start of the pandemic for the former director of the w h o's cancer program professor carol sykora told me that quarantine only makes sense for arrivals from places with higher infection rates than the u k. i think you know we're so at the critical moment in unleashing a lockdown and the 2 things that we need to do is to reduce the distance that we can safely stand away from each other from to meet as to what i think is a sensible 11 we should that's what the government show recommends and then get rid of the quarantine that there's no point the other countries in europe have a lower coronavirus incidence rate than we do so it makes no sense to quarantine people coming from a lower area now if you take latin america some of those countries are still quite high and that would make sens

s scientists and business leaders call on the government to digits coded 19 travel quarantine system professor peter p.r.'s the director of the london school of hygiene and tropical medicine says it's completely useless and should be dropped as soon as possible where experts say the blanket restrictions which force all arrivals to quarantine for 14 days would only have been successful at the very start of the pandemic. or former all of this unknown job by risk experts professor david alexander david thank you for joining us once your take on quarantined you think it's too little too late. it probably is in history protein has been very useful at stopping this pretty zs for example in seed ports but here in the modern world corona teen on its own is not going to work tracing testing selective isolation and so on there are all parts of the necessary package of measures that we need in order to get this under control but blanket quarantine pearlie isn't very helpful at this stage for example if you're coming to britain from a country with a low infection rate that what exactly is the point of current in your at the point of arrival for 2 weeks. on the other hand if you're co

$1000000000.00 heidi lawson is director of the vaccine confidence project at the london school of hygiene and tropical medicine joins me now via skype from the british capital good to have you with us on the program and how successful in your opinion has pledging conference in london been today. well there's been a tremendous amount of commitment both in terms of. high level support for the mission of the global alliance and the. and there's been a significant amount of pledging going on i don't have the total tally but i think . it really reflects the recognition that we are in an acute time extra need for support not just with the scenes normally but the thing that's different this year is of course in the face of coal that there's a new vaccine that needs to be accelerated and. out there but also because of the pandemic there's been a tremendous interruption of routine immunization so that will take an extraordinary effort to catch up so it's been a fantastic. support recognizing that what sort of research is required to. require the types of vaccines that you're looking for i mean basically what sort of va

we do know that this virus, according to research from the london school of hygiene and tropical medicine a dispersion factor or what we call k-factor which is very high. that means 10% of people who are infected may account for up to 80% of the viral spread. a study done in march showed that by just one church in arkansas, 92 churchgoers attended, and 35 of them ended up positive for covid. and then also think about this, that they have to go back to their communities, and they can spread the virus by bringing it to people who did not attend the event. and this is very concerning. we won't really know the impact for another 10 to 14 days, but it really is very concerning. that's why we're really trying to make sure people don't go to crowded arenas. >> comedian d.l. hughley was performing over the weekend. i'm sure you saw when he collapsed on a stage in nashville. he was treated for exhaustion and dehydration, tested positive for covid-19. he says he's asymptomatic, no fever, no cough. he's going into quarantine for 14 days. most are assuming that collapse was linked to the virus. would

of this and what we should make of it. professor david heymann is from the london school of hygiene and tropical medicine; he coordinated the. professor, thank you so much for your time professor, thank you so much for yourtime again professor, thank you so much for your time again here on bbc news. what are you reading into what we are hearing coming out of beijing now? how worried should we be? well, actually, yesterday at the world health organisation advisory group that i chair, we had a full presentation from the chinese centre for disease control about the current outbreak, and from what we saw, it is a very meticulous investigation to figure out what really has happened, and they are taking many precautionary measures, as you just said, including closing down some of the schools, having closed down several markets, including this one, which is a major wholesale market for foods. so the fa ct wholesale market for foods. so the fact they are taking so many precautionary measures, i mean, is all of that a positive, in your mind? i mean, is the view amongst you and your peers that everything that could be done is being d