Against hiv does not work. And, we have a special report from the himalayas, on how vital these yaks are to life in the mountains. Good morning. Its midnight in london, 8 00am in singapore, and in beijing where president xijinping has told his most senior team that stopping the new coronavirus from spreading is the countrys most serious task. He spoke as shanghais stock market crashed and the us closed its doors to any new visitors from china. A short time ago its been confirmed that 425 people have died from the virus, and there are over 2a,000 confirmed cases. From hong kong, Rupert Wingfield hayes sent this report. In a wuhan virus ward, a group of nurses and patients are singing a famous patriotic anthem. My motherland and i, they sing, are never apart. The propaganda message is not difficult to understand. In chinas state media, the focus is now on uniting the country to fight the virus. Hundreds of military doctors and nurses have been arriving in wuhan to join the battle. When our country is in difficulty, this female soldier says, it is our duty to be on the front line. Chinas logistical capabilities are beyond dispute. Which other country could complete a 1000 bed hospital in less than two weeks . Today, that is exactly what happened as the first patients arrived. But there is an ugly side to this all out fight against the virus. In this unverified footage, the man pinned on the ground was caught without a face mask. Spray him with disinfectant, the official shouts. In much of china, wearing a mask is now compulsory, despite doubts about their effectiveness. In this video, a whole family is being forcibly removed from their home, to a waiting ambulance. Lots of videos like these are being shared to foreign websites. They show police locking an old man suspected of having the virus in his home. Do you have enough rice, the policeman says. 0k, were chaining the door. Here the policemen are warning a resident who has posted something about the virus on social media. Sharing any information about the virus is illegal, he tells her. Scenes like those now can be found right across social media and they are really fuelling the sense of anxiety and fear about the coronavirus that is spreading right around the world, but nowhere more so than here in hong kong. People here simply do not believe they are getting a realistic picture of what is happening in wuhan and central china, and that is why there is now a crescendo of demands that hong kong close its border with the mainland completely. Hong kongs chief executive today ordered more border crossings closed but said some must remain open. There were indeed more hong kong people crossing the border, almost on a daily basis and then they have to come back. That was not good enough for these hospital workers who have now voted to strike until the border is shut. Fear is even more contagious than the virus. This is the centre of shanghai, chinas biggest city and economic heart. When the bill comes in for all of this, it is going to be huge. Rupert wingfield hayes, bbc news, in hong kong. Well have more on the coronavirus later. First some of the days other news the British Government has promised fundamental changes to the way convicted terrorists are handled following sundays knife attack in south london. Sudesh amman was shot dead by police after he stabbed two people. Hed just been freed from prison, after serving half of his sentence for terrorism offences. Heres the british justice secretary. A known risk to innocent members of the public is released early by Automatic Process of law without any oversight by the parole board. We will be doing everything we can to protect the public. That is our primary duty. And we will therefore introduce emergency legislation to ensure an end to terrorist offenders getting released automatically, having served half of their sentence with no check or review. Also making news today, seven critically ill children in war torn yemen have flown out of the country for medical treatment. The life or Death Mission took two years to organise and is a rare moment of cooperation between the warring factions. 23 others will follow on a second plane. The un says its a temporary solution to reduce the suffering of yemeni people. Heres the bbcs chief International Correspondent lyse doucet. Saying goodbye after months of waiting ina saying goodbye after months of waiting in a hotel, critically ill children and their parents, now at last heading to the airport to take them for the life saving treatment they so badly need. Its taken two yea rs of badly need. Its taken two years of tough negotiations to reach this point. This airfield is controlled by the houthis, and in the midst of these warring sides, a. House managers say senators have a duty to remove President Trump from office in their closing arguments of his impeachment trial. Mr trumps defence team have responded, saying that voters should decide his fate in this years election. The trial is expected to end wednesday with an acquittal. Malawis Constitutional Court has annulled the results of mays president ial election, which was narrowly won by the incumbent, peter mutharika. It ordered a fresh poll be held within the next 150 days. Thejudge said there were widespread, systematic and grave irregularities. Theres been widespread disruption in nigerias commercial capital, lagos, after a government ban on motorcycle and tricycle taxis came into force. Long queues of angry commuters formed while drivers of the traditional taxis staged protests, in some areas blocking roads and burning tyres. The Authorities Say theyve outlawed the taxis because of criminality in the sector and high casualty figures. Back to our top story now, the spread of the new coronavirus as chinese leadership admits shortcomings in fighting the outbreak. So what more could be done to stop the spread of the virus . Dr emma miller is from the college of medicine and Public Health at Flinders University in adelaide in southern australia. Think that in a very real sense, the world needs to consider that it cant actually be stopped reading, and in fact the World Health Organization wouldnt have declared an emergency of International Concern if it hadnt already gone beyond china and into other countries. I think that we do have to be careful that the efforts we are taking to try to address the issue are not actually exacerbating some of the problems that are going to be associated with the virus. What about putting a whole city in quarantine . Is this the answer . I really dont think that it is, and that is not necessarily what the World Health Organization is proposing. One other difficulty is, if the door had shut two seconds after the first few cases had arisen and one particular group of people had been stopped from contacting other people, then maybe there is something to be said for closing off whole areas, but the problem is that this virus was probably happily spreading in mild form for quite some time before serious cases started arising. What about your doctor . What would you propose, what should be done . think that mainly we need to be very vigilant. I think it a very vigilant. I think it a very good thing that the World Health Organisation has declared, is engaging the world in this way under its declaration. This is a novel virus which means, by definition, that we dont have any immunity to it in the population, but mostly that the infection will cause only mild to moderate symptoms, but in a small percentage it will cause very serious injury, very serious illness. What we need is to calmly make sure that we are monitoring the disease, understanding the way that it spreads, treating those that need it, and most importantly, helping lower Income Countries to manage those serious cases that are occurring in its borders. Doctor emma miller, thank you. We got much more on the coronavirus on our website. Lets go to the United States where in the midwestern state of iowa, candidates vying for the democratic nomination to oppose donald trump in novembers president ial election, face the first test of their campaigns. Its called the iowa caucus, thousands of gatherings throughout the state where voters pick and choose their preferred candidate. The bbcs Chris Buckler is in des moines in iowa. One of those precincts whether voting is taking place in. Before we talk about the runners and the riders, took us through how this works . Because the iowa caucus, it is quite a quirky voting mechanism in health . Yeah, people are gathering now, they are going out in the snow covered streets, they are going to schools, halls, members of the democratic party. And in those small groups they will essentially go into smaller groups to support the candidates that they want to see challenge donald trump in the 2020 president ial election here in the United States. And it is quirky, because this isnt a secret ballot, this isnt a secret ballot, this isnt like a normal election where you put your preference into a box. Instead, it is like a town hall meeting. They gather into groups that they wa nt to gather into groups that they want to see the candidates go forward and challenge donald trump. It is a very public event and quite an unusual event and quite an unusual event but it gives a sense to the democrats who are the leading contenders in this battle to become president , or the president ial candidate for the president ial candidate for the party, and it is a tight one at the moment. We have at least four candidates who are doing particularly well in the polls and it could be a pretty tight one. Took us through the runners and riders are. How strong is joe biden . Runners and riders are. How strong isjoe biden . Hes the one that everyone is talking about the moment. Of course, a former us Vice President , and somebody who hopes he will do well out of iowa. What is see from each of these candidates including joe biden is that they have been here for months, putting in dozens of days of campaigning in order to try to persuade iowa that they will be ina persuade iowa that they will be in a position to vote for them, but he is not the only one. Bernie sanders is also here, there were 3000 supporters supported by the band vampire weekend. He has a very young supportive fan base who may well come up for him and he could be another big contender. The others are Pete Buttigieg who of course is a small town near from south bend who of course is a small town nearfrom south bend indiana but has also ended up being a real potential candidate in this and he hopes to do well here as well as elizabath warren. Senator fort massachusetts who has been one of president drums pose, and that vitriol from the president sometimes gives you media attention. Amy culpitt cha, another senator from not that farfrom here. Every sense another senator from not that far from here. Every sense we get at the moment is that this could be tight and they are going to be watching the numbers extremely closely. From each of those, they are going to gather all of the votes on the big board and we get a sense of who will be a front runner as it goes from iowa to the others as the democrats go through the state by state basis. Although iowa actually shows, historically, who then ends up as the democratic nominee, at least for the past four terms, it doesnt. Nominee, at least for the past fourterms, it doesnt. Its not necessarily as clear cut as that, is it . You are quite right being a front runner here is great because it means you have momentum going into these other states, it also means you are in a position where you can basically get more money which is very important for campaigns, but actually, iowa is just important for campaigns, but actually, iowa isjust a important for campaigns, but actually, iowa is just a start and it is going from these different states, New Hampshire is going to be next and of course super is going to be next and of course super tuesday can be a big moment at the start of next month, and it could be even more important for the democrats, because although he is not taking part in the particular caucus, Mike Bloomberg who is a billionaire and another flow of donald trump is someone who is already advertising. He has chosen to stay out of these early contests but he will come in on super tuesday when a lot of votes are available, when you can get these delegates to really push the idea that they can potentially be Democratic Candidates doubly so Mike Bloomberg is in here but he is overshadowing, to some extent, this campaign and you do get the idea that it is not going to be one in iowa this year, but as i say, it is so important for momentum and that is why they are here and a d roves. Is why they are here and a droves. They have spent so many days campaigning in the school lunch halls and sports halls just trying to get people on the sides copy iowa frankly matters. And that is why we will be back with you in about 45 minute, and the whole team there and iowa. Thanks so much. You are watching newsday on the bbc. Still to come on the programme Scientists Say they are deeply disappointed that an experimental anti hiv vaccine does not work. We will find out what that means in the battle to stamp out aids. Also on the programme its a hard life for yaks. We report on how the tough mountain creatures are struggling to survive in india. This is the moment that millions in iran had been waiting for. After his long years in exile, the first hesitant steps of Ayatollah Khomeini on iranian soil. Concessions unparalleled in the history of apartheid. The ban on the African National congress is lifted immediately, and the anc leader, nelson mandela, is to be set free unconditionally. Four, three, two, one. A countdown to a critical moment. The worlds most powerful rocket ignited all 27 of its engines at once. And apart from its power, its this recycling of the rocket, slashing the cost of a launch, that makes this a breakthrough in the business of space travel. Two americans have become the first humans to walk in space without any lifeline to their spaceship. One of them called it a piece of cake. Thousands of people have given the yachtswoman Ellen Macarthur a spectacular homecoming in the cornish port of falmouth after she smashed the world record for sailing solo around the world non stop. This is newsday on the bbc. Im rico hizon in singapore. And im kasia madera in london. Our top stories the number of people who have died from the new coronavirus in china has now risen to 425, as the government admits shortcomings in its response to the outbreak. Voting is about to start in the iowa caucuses, the first clear indication of who is leading the way in the race to be the democrats president ial candidate. Lets take a look at some front pages from around the world. The Philippine Star leads on one of our ongoing stories, the coronavirus. Investors are worried, as more than 400 billion have been wiped from chinas stock market in its first trading session after the lunar break. The strait times also looks at the coronavirus outbreak. Singapores health minister, gan kim yong, told parliament they have already begun developing a portable testing kit for the virus. But in the uk, the focus is on sundays knife attack on the streets of london. The guardian reports on the governments plans to change the time convicted terrorists serve in jail. The proposal could mean prisoners currently due for release halfway through their sentence could now spend longer time injail. Those other papers. Those are the papers. Hopes that an experimental vaccine could protect people against hiv, the virus that causes aids, have been dashed. The trial of more than 5,000 people in south africa was stopped as it found the jab did not prevent the disease. Dr Carl Dieffenbach is the director of the division of aids at the National Institute of allergy and Infectious Diseases in the United States, who sponsored this study, and explains why it was stopped. So, by stopping the study, an independent group outside of the trial took a look at the information that has been generated to date, and based on rules that were set before beginning the study, said this trial can never demonstrate any level of activity for this vaccine. So its just level of activity for this vaccine. So itsjust its highly appropriate to stop the vaccinations and then start a year of follow up just to make sure that everybody who received the vaccine is basically fine. So how was the vaccine supposed to work, then . So the vaccine is supposed to go into your body, like any other vaccine, and make an antibody or an other vaccine, and make an antibody oran immune other vaccine, and make an antibody or an immune response that will then fight the virus. And while we know the vaccine went in and made an immune response, it clearly was not able to fight the virus. So its almost. From the five. Just over 5000 people that took pa rt just over 5000 people that took part in this, nearly as many people became infected with hiv as didnt, is that my understanding . So why did this fail . That is the most important question. Its a very important question. Its a very important question. Its a very important question. But what we saw, and thats why we do randomised controlled trials, where half the people get the vaccine and half the people dont, and if the infection level is the same in both groups, the vaccines not working. So it fundamentally failed to do what it was designed to do. But what is interesting is that this is based on a previous vaccine study that ended in 2009, in thailand. That worked, so why is this one not working . Well, thats a really interesting question. And most likely, and this will be a lot of speculation, but my personal feeling is theres something unique about the virus in south africa thats different than the virus that circulating in thailand. That said, that is just one idea. There were a numb