this is bbc news — i'm kasia madera with the latest headlines for viewers in the uk and around the world. inside the race for a vaccine. we are with a team at imperial college, london — using a revolutionary new approach to develop a solution to covid. it means that we can make the equivalent of 2 million doses in the volume of a litre. imaginea in the volume of a litre. imagine a litre bottle of lemonade, that would have 2 million doses in it. imposing new restrictions — new york and two other states clamp down on travellers from the us where infection rates are surging. three suspects arrested after the killing of black jogger ahmaud arbery are indicted on murder charges.

and in moscow, the traditional show of military power on victory day — as president putin prepares to ask for a further term in office. hello and welcome to audiences in the uk and around the world. there are more than a dozen vaccines being being trialled around the world — all with hopes of ending the coronavirus pandemic. producing a vaccine is a slow, complicated and secretive process. the bbc has been given exclusive access to the first human trials of a vaccine being developed by imperial college in london — it has an approach that has never been tried before. here's our medical correspondent, fergus walsh. coronavirus has transformed all our lives. and although restrictions are easing, there's only one certain way out

of the pandemic, one way to protect us all from the virus, to return society to normal, and that's a vaccine. never has science responded so fast to a global health threat. what usually takes years has been done in months. there are now more than 120 coronavirus vaccines in early development. 13 have begun human trials — five in china, three in the united states, two in the uk and one each in australia, germany and russia. we'll need several to work if there's to be enough doses to protect 7 billion people on the planet. after oxford university, now imperial college london is the latest to begin trials. kathy, who's 39, is one of 300 volunteers who will receive the imperial vaccine. she'll get a second booster dose in four weeks. why did you volunteer? i think it came from not really

knowing what i could do to help, and this turned out to be something that i could do, and understanding that it's not likely that things will get back to normal until there is a vaccine, so wanting to be part of that progress as well. if the safety trial goes well, a further 6,000 volunteers will be immunised in the autumn. trials might also need to happen overseas, in virus hotspots, because that's the only way researchers will know for sure if it offers protection. i wouldn't be working on this trial if i didn't feel cautiously optimistic that we will see great immune responses in our participants, but there's still a long way to go to evaluate this vaccine. this is a really unusual vaccine. the synthetic genetic code it contains should instruct muscle cells to produce the spike protein found on the surface of coronavirus. that should prompt the creation of antibodies, and that army of antibodies should remain on guard in case of future

exposure to coronavirus and, if it works, prevent infection. because it's all created artificially, with no need to grow any virus, the vaccine could be manufactured need to grow any virus, the vaccine could be manufactured on a huge and concentrated scale. it means that we can make the equivalent of 2 million doses in the volume of a litre. so, if you imagine a litre bottle of lemonade, that would have 2 million doses in it. so, when you want to start making vaccines for the world if this is successful — and that's still a big if — it makes it so much more tractable because you don't have to build a factory the size of several warehouses. imperial college say they could have enough doses ready to immunise a0 million people in the uk by next summer, but trials must first show the vaccine is safe and effective.

new york and the neighbouring states of newjersey and connecticut are introducing a 14—day quarantine period, for visitors from 9 other us states, with high rates of coronavirus infection. new cases of covid—i9 in the us have risen to their highest level since april. 0ur north america editorjon sopel is in washington. there are now 26 states in america where they have seen more covid—i9 cases this week than they did last week. a handful of the biggest states, florida, texas, california, arizona are seeing massive spikes with thousands of new cases being reported each day. a hospital in houston, they've got 97% occupancy of intensive care beds. now, donald trump says this is all because of increased testing. his public health experts say it's far more serious than that. and if you compare the us to the european union, the difference is really stark. it's something like 100,000 of population, six or seven

times worse in america than europe, and that's leading the eu to consider introducing a travel ban on passengers coming from america into europe, and that would be a damning verdict on donald trump's handling of coronavirus. it would also be a very bold move by the eu, because it's bound to infuriate the president. this is much more than a simple public health issue. let's get some of the other main developments. a us appeals court has directed a federaljudge to drop the criminal case against president trump's former national security adviser, michael flynn. mr flynn was fired afterjust 22 days for lying about his contacts with russians, and pleaded guilty to lying to the fbi. he later asked to withdraw his plea and the case was handed to a districtjudge. this overruling effectively ends the politically—charged case. the international monetary fund says the coronavirus pandemic

is damaging the world economy even more than it previously forecast. the imf now predicts that global output this year will shrink by nearly five per cent and wipe twelve trillion dollars off global output over two years. china is the only large economy forecast to grow at all this year — byjust i%. one of the largest companies in the british aviation industry — swissport uk — is reducing its workforce by more than half. the airport ground handling firm is cutting more than 4,000 jobs, which it says is a result of the coronavirus pandemic wiping off three—quarters of its revenue since may. only 68 people in france have used the government's new coronavirus contact—tracing app to record an infection — despite it being launched over three weeks ago. the stopcovid app has alerted just 14 people that they've been in close contact with an infected person. in germany the authorities in the state

of north rhine—westphalia have reimposed lockdown restrictions in two districts after a spike in cases of coronavirus. one area contains a meatpacking plant where more than 1,500 workers have tested positive — and a mandatory quarantine is in place for all employees. it is the first time lockdowns have been reintroduced in germany since the country began easing restrictions in may. 0ur europe correspondent gavin lee reports. this is the source of germany's biggest coronavirus outbreak. the tonnies abattoir in gutersloh. 1,700 workers here have caught covid—i9.