this is bbc news. the headlines: joe biden has been handed a major boost in the democratic contest to take on donald trump in november's election. the former vice president has won the party's primary in south carolina. it's be a welcome result after poor performances in the race so far. president trump says it's time for american soldiers to come home from afghanistan after the us signed an agreement with the militant group, the taliban. he said the us had committed to withdraw five—thousand troops by may and that he would meet taliban leaders in the nearfuture. the president's also urging calm after coronavirus claimed its first life on us soil. he said more cases were likely but that the country was well prepared. the victim who was in his fifties, was being treated in hospital in washington state and is said to have had underlying health conditions.

more now on the coronavirus and our health editor, hugh pym, has the latest on the preparations the government is making here. he said that containment remains the main strategy. that means taking cases who are diagnosed positive straight to hospital to isolation facilities and then tracing their contacts. and health officials still feel it's possible that will bring this virus under control. but there's a recognition that things could change very rapidly, globally and in the uk, in terms of the number of cases. and, to that end, the government's about to ramp up its response with a series of announcements over the next week, starting tomorrow with the health secretary, matt hancock, who's appearing on the marr programme. it will require a lot more co—ordination of government departments to focus on the virus as a priority, working with the devolved administrations. there will be an action plan announced during the week. one of the measures being considered is something that will allow a rapid redeployment of retired health staff, bringing them back into the nhs, getting them reregistered quickly. that's being considered.

and you've only got to look across the channel to see what can happen. in france, week or so ago there were only a dozen cases, now it's more than 100. and today the french authorities have announced a ban on all events involving more than 5000 people in confined spaces, for example a big agricultural show in paris. an example of this sort of thing governments are considering. and, of course, here the chief medical officer for england has raised the possibility — only the possibility — of school closures and events been cancelled if things escalate from here. hugh pym there. and you can find out more about the symptoms of coronavirus and how to protect yourself against it on the bbc news app and on our website bbc.co.uk/news. now on bbc news — it's click. this week: how can this fit in here? and is the new folding huawei up to scratch?

and it's my entry for eurovision. heart rate, temperature, steps, diet, these days we can track all of our vitals. all of this data can help us to understand and tweak our lifestyles, but it's also moved way beyond the basics, allowing smart phone connected devices to monitor conditions like asthma or diabetes from home. lara lewington has been to meet someone who's using something a little bit more advanced a smartwatch to monitor his health.

he's had a tiny computer inserted into his heart. around 26 million people worldwide are suffering from heart failure, where the heart is struggling to pump blood around the body. for some time now technology has been used to keep track of heart conditions. so i've come here to hammersmith hospital, where an innovative procedure is being carried out. 71—year—old retiree andrew lives with heart failure, requiring precise medication to keep him well. what's stopping you, it is breathlessness or is a pain in the chest? well, it's breathlessness. but it's not like a fit person's breathlessness. i was having a monthly appointment with consultants. and, of course, with walking is always a problem, because wards a quite a long way apart. i can walk 15 yards and then i have

to pause and gather breath. today, though, andrew's having a tiny microcomputer inserted into his heart. what we want to offer you is a device that will sitjust on here that's able to monitor the pressure in the left atrium. it will give doctors access to continuous data so any changes to his condition could trigger an alert. getting prior warning would keep me out of hospital and would mean i could be treated at home. this is the second procedure of its kind in the uk. up until now we've never been able to get this data in a patient who's not in an operating theatre with a catheter positioned in the heart. so this is, potentially, a major step forward. it means we can adjust the medication in the early stage, which reduces symptoms and, critically, reduces admissions to hospital.

the device is threaded through the veins into the heart. once in place, its wings will open, securing a sensor inside the left atrium. and the really cutting—edge bit — a microcomputer in the right. to reduce the size of the implant, we developed a proprietary technology that enabled digital transmission of the data without a battery. it charges a bit like a phone with a wireless charger. the belt powers the device as well as sucking the data from it so it can be sent to the cloud. from there, ai algorithms interpret the readings to flag if a doctor needs to take action. the more data we will gather throughout the time, the better our ai—based

system will be. finally, it's time for andrew to go into surgery. doctors use ultrasound probes and x—ray vision to see inside his body. equipment is fed through his veins and a central wall in andrew's heart is pierced so the device can be put in place. this is usually the riskiest part of the procedure. the device is now going into the heart. fortunately for andrew, all goes to plan, as this is the only way to get data directly from the left atrium. the device has now been released from the catheter and is sitting on the septum. you can see the two sides of the umbrella of the device are attached to either side of the septum to secure it there. the procedure‘s gone very nicely. it's a perfect result.

a month after the operation, we met to look at the data that had been collected and how useful it seemed. these look like perfect traces, like the traces we would see if we had an invasive catheter at the time of a procedure. so this is very, very good quality data. what does this mean for the data that you're looking at long—term? we will be able to see changes within the pressure in andrew's heart. and this is likely to be before he develops symptoms, so we can adjust his medication to try to prevent worsening of his symptoms. and that way we will be able to keep andrew as he is now, nice and stable. how has this changed your life? emotionally it has. in that i can see a future now. i felt i'd just been put in a filing cabinet, just waiting for something nasty to happen. but now there's possibilities of further treatment. what would you say to anybody else in a similar situation to you about the trial what you've experienced so far? consider it.

i think it will improve their life. hello and welcome to the week in tech. it was the week concerns over coronavirus wiped more than $238 billion off the stock value from the five biggest us tech firms. the uk broadcasting regulator 0fcom found that radiation levels of 56 are well within health and safety limits and a us enquiry found that the death of a tesla driver, while his car was in self—driving mode, was caused by the driver's over—reliance on the autopilot system. in ‘is that really necessary‘ robot news, how about searching for a book with an autonomous librarian? the around bee is a service bot that guides you to books you're looking for. and, if you're suffering from carrying just a few too many, will carry them for you. if you've ever thought a robot could do with a softer touch, a jellyfish would probably agree. this silicon—fingered robot helps

pick up jellyfish and other deep sea creatures without accidentally squishing or harming them. the handy soft bot also seems to cause less stress to the animals. and, finally, researchers at japan's osaka university have developed a robot that can feel, sense, and express pain. but, for someone unthinkable reason, they've made it look like a child. the disembodied robot is programmed to smile, grimace, and wince. it's hoped that teaching it to recognise pain will help the artificial intelligence learn empathy and so better care for humans. let's just hope it doesn't learn to feel revenge. the end of february every year is a big time for us. having painstakingly planned for months and fought thousands of other journalists for access to the big stories, we head to barcelona for the mobile world congress. it's where the big companies launch their big new phones and the small companies show off clever new innovations that may one

day change the world. only this year, as you may know, mwc is off. cancelled because of concerns over the spread of the coronavirus. it's proved a nightmare for the telecoms industry but our chris fox, who was due to cover, thinks he's going to get a week off, however, not everyone has cancelled. some companies have gone to barcelona anyway. so i've got a bit of news for chris. the cancellation of mwc has been nothing short of a nightmare, especially for me, i couldn't cancel my flights at such short notice and i'd been left stranded here in barcelona with no work to do. it turns out huawei hasn't cancelled its flights either and are still doing a press conference — right now. with the venue already booked

and huawei executive richard yu already in town, the company decided to do its launch event anyway. only this time it was pre—recorded a day early and played out on the big screen. the big reveal was the follow—up to its first folding phone. and here it is. the folding huawei mate xs. if i open the instagram here, there's some pictures of dogs, and if i open the phone out, the pictures expand to fill the view. one thing i can't show you is google maps, because the phone still doesn't have those google apps. in fact, huawei's now added its own app gallery which it says will be a competitor to the google play app store. snapchats, tiktok, they are on there, the sun newspaper is on there, and bbc news, but some big ones are missing, of course. now, the concerns with folding phones as that displays might be easily damaged because they're flexible. now, huawei says since the original mate x it has made

the screen more resistant. although i have seen a display screen with a big old scratch on it. huawei says there will be cases available. also revealed was a smart speaker. here it is, it's called the soundex. all you do is tap the phone here to pair and then you can play your music, including from spotify, because that is in the app gallery. so here we go. loud music plays that's quite loud. oh no. so one thing they did tell me was you can put your hand over to silence the speaker if it's too loud. and that should have silenced it then. now, the company says the way the speakers here are configured as one faces this way and one faces the other way so the vibrations cancel each other out. so they say you can turn it up twice as loud as the apple homepod without it vibrating itself off the table. and that was very loud. while we are here, can we talk about product names? we have the matebook,

the matepad pro, and the m pencil. i wonder where they got their inspiration from? on the outskirts of town, toothbrush giant oral—b pressed on with an immersive dinner and light show experience, and if you are why wondering why a toothbrush company is at mobile world congress, well, their toothbrushes have bluetooth in them... ..obviously! the new oral—b io has a magnetic drive, they say, is whisper—quiet, although to test that i have to go somewhere silent and i knowjust the place! usually at this time of year this place is full of the world's mobile phone industry but i can't think of a quieter place, this time, to test the toothbrush, so, here we go. i will hold at the same distance from my mic, so this is the regular oral—b. whirring. very noisy. this is the new one. whirring.

also, fairly noisy and they said in the presentation this is the toothbrush that whispers but i am not convinced that is a whisper. the ultimate test is, of course, whether you can hear it through the bathroom door and whether it will disturb your partner so we tested that in the hotel and the resounding results of our very scientific test is, yes, you can still hear it through the bathroom door. honor also went through its new product launch — the new view 30 pro phone has a dual view recording mode, so you can take videos with a wide—angle lens and close—up lens at the same time. realme was planning to come to mwc for the first time this year, though but they did it in madrid instead. the x50 pro comes with a new focus mode that let's you lock yourself out of the phone for a few minutes and listen to relaxing sounds. perfect to combat the stress of reorganising your plans because due to coronavirus. a new event has risen

from ashes of this year's mwc. the phoenix event is a chance for companies, whose plans were disrupted, to meet and pitch their ideas. i don't think anything will substitute the person—to—person interaction. i was having this conversation with someone at a networking event this morning and it'sjust, when you have a physical connection, i think business is just different. in the end, the wmc week was not a complete disaster for everybody. there's also some interesting sg innovation going on underground, just in time for mwc week, as omar mehtab found out. recently, it has been impossible to avoid 56 at mwc. well, this year you can because there is no show, so, the city and these train halls are eerily silent. but one project looking to make its debut for this year's event has still gone ahead and it is all happening below the surface. and before showgoers even reached mwc, they were going

to experience a superfast mobile network coverage on the underground on the way there. the 56 barcelona initiative was set up to provide the city with the next generation of mobile broadband. it is currently available between four stations of barcelona's train service, including europa theatre, the closest station to where mwc takes place. but 56 isn't just available on the train platform. it's also available in the tunnel as the train travels, becoming one of the first in the world to do so. let's see how fast the coverage is down here. i was getting around 1.1 gigabytes per second on average on the platform but it was quite a bit lower

when travelling on the train. the speed does differ between going down the tunnel and being in the station. it's slightly lower in the tunnel and it does vary. sometimes it can be as high as 500 meg or it can be as low as 170 but, saying that, you are still getting decent coverage down in a tunnel! and it meant i could watch a bit of click with barely any loading time whatsoever. but how is this achieved? well, we waited until the train service was closed so we could get into the tunnel and check out the sg antenna. each set of antennae are roughly 500 metres apart with 15 currently installed between four stations, but only vodafone provides 56 coverage in barcelona, and they own all the masts on the train line but the plan is to this for the entire train network. however, there is no clear date when this will happen. 56 requires more masts than previous network connections, so this setup can be quite complex.

these are the first steps. very difficult for us to make all the installation at this moment. it is expensive. but we think it is a good investment for the city. if other networks come in and say, "we want to do 56 down in the rail network," then will vodafone share the masts or will they have to install their own masts? we want to provide different operators and different networks our services with vodafone. perhaps this is possible, of course, becasue vodafone is the owner of this network. you have to hope they say ‘yes‘? we have to be prepared for this situation in the next furture. but, until then, this 56 set up will act as a test lab for companies to create and test their apps, both to improve their railway logistics and what travellers can do on their phones whilst on theirjourney.

it looks like 56 is becoming part of the daily commute here in barcelona, but we did hit a little bit of problem. when testing the speed of the sg network, we hit the data limit, we used about ten gigs in about an hour, so you might want to switch to an unlimited plan! this is a piano and this, quite frankly, is all i know how to do. play these four chords over and over again until you get a massive hit — trust me, it works. but learning an instrument properly takes hard work. it takes skill and it takes a great teacher, none of which i have, but take a look at this.

this is ar piano. you point your phone at your keyboard and, hey presto! you get a virtual virtuoso to show you how to tackle complex piano pieces and the interesting thing is you can slow it right down and get really close, so you can see how you are supposed to shape your hands as he moved from one note to the next. the problem is i'm not quite sure how to hold the phone with one hand and get both hands in to copy what he is doing, so... there is a way to get more hands on, though, or more accurately, hands in. lj rich tried a prototype which its makers promise can teach anyone to play. this little keyboard wants to teach you how to read music. so many people come up to me and say, "i really wish i had learned to play an instrument but it's too late for me now," and i really don't think that's the case. certainly, with some technology, it could be easier than you think

to play your favourite song. music company roli took me inside their hq to show me its prototype keyboard, a lumi, a light up bluetooth device aiming to give everyone an opportunity to learn their favourite song. now, light up keys are available on quite a few entry—level keyboards but the lumi has multicoloured leds so it can make it easy to find where you are if all the c notes are, red, for example. sheet music has stayed the same for hundreds of years, originating from writing down hand movements the choir master. the ceo of roli, amongst others, feels it is time to bring reading music into the 21st century. still, most people today, when they learn to play music, they learn to read music with a traditional score. that is a quill— based technology.

even the shapes of the notes, even though they are not perfect circles, has to do with a quill pen and how you would write with that and that kind of calligraphy from 500 years ago. it is remarkable that that form of notation and system is still what we use today. the device connects to an ipad and with the help of an app and something that gives you a little bit more than just notes on a page. there is an element of intimacy or even privacy with the music learning experience. if you have a lumi and the lumi app and put on your headphones, you are in your own learning word and go at your own pace and the app will give you feedback. it is between you and the instrument and you do not feel like necessarily you are being judged in a way that you may if you had a teacher or parents looking over your shoulder.

it is likely the software may prove more lucrative than the hardware. choose is a song from a list of licensed partners and the app encourages people to learn to read that music. first, blocks that wait for you, a bit like the game guitar hero. then, you have to play in time where the colours help you find the notes and, finally, full—blown, grown—up score reading. once you become a skilled musician, you may be at a point we close your eyes and have the relationship between the sound and your muscle memory and your body. and there is a point at which you can let the visual go as part of a primary form of music making, you know, and even music learning experience. but to get to that point is very difficult and most people fail because they feel, i think, that the overall system is too complex and too austere. i certainly found the device visually pleasing and felt the urge to customise colours, a feature may soon become available. bar a few latency issues,

i think it is a clever, if slightly pricey way, to learn music theory. those with extra cash lying around can buy a few and link them together to get a longer keyboard. regardless, i will take the opportunity to encourage anyone who sees this to get on a piano, keyboard or any instrument because when it comes to learning, it's never too late to start. that was lj and that is it for this week. do not forget we live on social media so you can follow us throughout the week on facebook, youtube and instagram and twitter at bbc click. thank you for watching and we will see you soon. hello there. we have seen the rainfall

from storm jorge compounding the flood issues. there are numerous flood warnings in force across the united kingdom and storm jorge is still producing some very large gusts of wind as well from these tightly packed isobars and several more hours of that to come, really, through sunday morning. those gusts of wind are quite likely to cause some travel disruption but could also bring down some power lines, or some trees as well. now they will still be with us through the early hours and sunday morning but, as well as that, we have got this curl of rain, just affecting the northern half of the uk. but it is notjust rain, it's snow to modestly low hills — about 200 metres. with those strong winds, it will be blowing around so blizzard conditions. fewer showers further south but they will still be around, blown in by that very strong and gusty wind. temperatures largelyjust above freezing but it is clearly going to be icy where we have got

the snow, in particular. and still that rain keeps coming for the northern isles. tending to ease a little bit through orkney as we go through the day. but that rain, snow, slowly meanders northwards. more of it around, i think, to scotland than we had on saturday but tending to become more showery for northern ireland, for england and wales. it won't be a totally dry day but hopefully there will be more sunshine around and the winds by the afternoon are starting to ebb away, just maintaining their strength a little bit for longer further north. but it will make it feel chilly, if you're out and about. for the start of march, barely double figures, even in the south. below par really you might say the temperatures for the start of the meteorological spring. and then this area of rain is a concern through the night as it comes across, we think, southern parts, it's falling into cold air. it could give a snatching of snow for the downs, for the cheltenhams potentially, towards rush hour and certainly making things slippery, with a colder night on the cards, fairly widespread frost, as you can see, going not monday morning. so we clear that away but it takes its time. as i say, it could be a smattering of snow on the hills and then the showers that follow because it is still cold air will be wintry as well, over the hills,

so only 6—9 degrees celsius. yes, the winds will not be as strong however. now, as we take that area of low pressure away later on monday, we've got another one rushing in towards southern areas. that could be our next dollop of rain. potentially need to keep an eye on it. all through the week it looks as the if the low pressure will dominate towards the north—west and we may eventually see high pressure building actually towards the south. but for most of the week, temperatures will be lower than they should be, both by day and night. some night frost. and t is a bit of a showery picture with an occasional risk of some lengthier spells of rain. as ever, there are warnings out — they are on the website.

this is bbc world news. i'm simon pusey. our top stories: a boost for biden‘s bid to take on trump — the former vice president secures a much needed win in south carolina's democratic primary. the press and the pundits have declared this candidacy dead. now, thanks to all of you, the heart of the democratic party, we've just one, and we've won big because of you! the us sees its first death from the coronavirus, but donald trump calls for calm and says everything possible is being done. a moment of history — the united states and the taliban sign a deal that it's hoped will end 18 years of war in afghanistan. a shock result in slovakia's general election, as an anti—corruption campaigner ousts the sitting prime