And in the uk, teenage activist Greta Thunberg marches with thousands of young people against Climate Change hello and welcome to world news today. Thereve been sharp falls in stock markets around the world as the coronaVirus Outbreak sparks fears of a worldwide recession. More than five trillion dollars have been wiped off global share values this week. The markets have had their worst 7 days since the Global Financial crisis more than a decade ago. Our global trade correspondent Dharshini David reports. Dont be deceived by the cheers. Thats just the traditional way to mark the opening of stock markets on wall street. The truth is that american shares are on track for their worst week since the financial crisis in 2008. Around the world, billions have been wiped off the value of investments such as pension funds. Reality has hit. Coronavirus isnt just a problem for chinas economy but all our fortunes. We would expect that world growth would be lower than it otherwise would be. We are not picking it up yet at all in the uk Economic Indicators survey, or other things, but if the world is slower than it otherwise would be the uk is very open economy and it has an impact. As outbreaks of the virus have multiplied around the globe it has become clear that the economic disruption will be equally widespread. Now, from car makers like Jaguar Land Rover to Electronics Giant apple, Global Manufacturing supply chains are being hit by factory shutdowns in china. But demand is also affected. Efforts to contain the disease have hit travel and tourism. British airways says it can no longer predict what its profits will be after flights to china and now italy have been disrupted. Consumer spending has also been damaged. Starbucks and diageo, the Company Behind guinness, are among those who have seen sales fall, as people stay away from bars, restaurants and shops. Now the problem is, all of this comes at what is already a difficult time for the world economy. China, japan and the uk are among the countries where growth has been faltering. Some economists are warning that perhaps £850 billion could be knocked off Global Growth this year, a hit that would be hundreds of times greater than that of sars. It isnt all gloom. There are several threads to the tail of this knitwear manufacturer in leicester has picked up orders from elsewhere. A lot more new inquiries are coming through but there is a bit of concern about the kind of earlier supply chain in getting Raw Materials in and to make sure we are not going to run out of any of them. What can be done to support businesses . Policymakers across the world could cut interest rates. But as they are already low there is very little firepower left. For authorities, businesses and investors the anxiety is set to continue. At least 50 countries have confirmed coronavirus cases so far with the virus spreading to many of them from italy. It started in the northern regions of lombardy, around milan, and neighbouring veneto. Eleven towns are in quarantine. There have been 21 deaths from the virus. All these European Countries have cases that are linked to the italian hotspots from denmark and lithuania in the north to spain in the south. That includes hundreds of guests in lockdown in a hotel on the Spanish Island of tenerife, which stemmed from an italian couple on holiday there. The first patients to catch the disease in wales and Northern Ireland here in the uk caught it on a trip to northern italy, as did a woman from greece the first case too in that country. And demonstrating how far and fast covid i9 spreads, on tuesday, latin americas first case of the virus was recorded in brazil again someone who had just returned from italy, as were infections in algeria and nigeria. The World Health Organisation has raised the global threat level from coronavirus to very high the highest possible level of alert. Heres the who director general. The continued increase in the number of cases and the number of affected countries of the past few days are clearly of concern. We have been monitoring this continuously and we have now increased our assessment of the risk of spread and the risk of impact of the virus to very high at global level. Ive been speaking to the bbcs Imogen Foulkes in geneva who told me more about what kind of tone the w h o is trying to set. I think more than ever, they need to act more robust. To try and reassure the public that, the less think they wa nt the public that, the less think they want to see is panic. The doctor also said that one of our greatest issues, our greatest enemies is fear. We should not be fearful, we need to be sensible, look at the evidence and 50 and more countries. As you pointed out, more than 20 of those countries have had just one case. What that tells the experts is this could still be contained. But only with careful robust action. Were there any talk of the hunt when it comes to a vaccine . There is progress being made and also progress being made and also progress with treatment specifically for the coronavirus because there arent any at the moment. But these arent any at the moment. But these are things that will take time and the virus is moving faster than the science and the research and development on this one. Will be great to have a vaccine, but it will not be in the next six months or perhaps in the next 12 months and right now, the viruses circulating in the efforts of got to be in containment and at the same time on the back burner, as fast as we can, but it will not be fast enough to stop this virus and its tracks, but a vaccine as well hopefully for the future. And you can keep up to date with all the latest developments on the coronaVirus Outbreak by visiting our website. Theres a live page with all the latest developments, plus analysis from our correspondents. Simply go to bbc dot com forward slash news. Or download the bbc news app onto your smartphone or tablet device. Crisis talks have been taking place to prevent a Major International escalation of the civil war in Northern Syria after a surge in fighting between turkish and syrian forces. 33 turkish soldiers were killed in an airstrike, and turkey has responded by targeting hundreds of Syrian Government sites. Our International Correspondent orla guerin has sent this report. Payback. In syria today the Turkish Military were hitting hard. Striking more than 200 Syrian Government targets. Retaliation for yesterdays killing of 33 turkish troops. At the scene today in Idlib Province, resting in the dirt, the uniform of one of turkeys fallen soldiers. Pictures filmed for the bbc show the impact of the massive air strikes. Turkey has blamed the assad regime but moscow, syrias ally, controls the airspace. Turkeys defence minister hulusi akar says russia has no excuse. Translation even though we told russia in advance the location of our troops, the attack happened. After the first strike, we warned them again, but it continued. Even ambulances were hit. Here, the two leaders at the centre of this dangerous escalation. President putin and president erdogan who leads a nato nation. So far, nato isnt rushing to turkeys aid, just calling for russia and syria to end their assault on idlib. I call on them to stop their offensive, to respect international law, and to back un efforts for a peaceful solution. And this is what western leaders may be most worried about. Refugees heading from turkey to europe. Already today, a trickle since word went out here the authorities would no longer try to stop them. They are turkeys leverage with the international community. In the past, refugees would have been refused. Not today. This man is hoping to get his family to belgium. It is too late for us, he said, we are leaving now for the sake of our children. Turkey hopes they and others like them can be its passport to International Help with idlib. Lets take a look at some of the other stories making the news. A large fire has broken out at a major paris train station. The gare de lyon station was evacuated, with footage showing cars and scooters ablaze. Police say the fire was started by demonstrators. They were protesting against the congolese singer, fally ipupa, who was giving a concert nearby. They say nobody appears to have been hurt. New zealands Prime MinisterJacinda Ardern has called australias policy of deporting foreign nationals convicted of committing crimes corrosive. The comments were made at a heated News Conference with her australian counterpart, scott morrison. Australia has been deporting hundreds of people to new zealand even though some left at a young age. Womens rights activists have clashed with police near the venue hosting the cesars Frances National film awards. Theyre protesting against the academy nominating a Roman Polanksi film for 12 awards. The director fled the us in the 1970s after being convicted for statutory rape, and faces other accusations of sexual assault. Stay with us on bbc world news, still to come britains prince harry follows in some very famous footsteps in one of his final engagements before stepping back as a working royal. This is bbc world news today. Im Lewis Vaughan jones. The latest headlines. The virus causes another frantic day on the markets, theyve been hit with their worst week since the financial crisis sparked by fears of a global recession. The World Health Organisation has raised its assessment of the coronavirus threat to the highest level. To afghanistan now where the week long reduction in violence is over as the country prepares for an historic agreement to be signed between the United States and the taliban. It could pave the way to potentially ending more than 18 years of conflict. President trump said if both the afghan governments and the taliban live up to their committments, then there will be a path forward to end the war, and bring us troops home. Our chief International Correspondent lyse doucet is in qatar where talks between afghan leaders are taking place. As you can see, very windy day in the state and the hours to go now before this historic signing. A deal between the United States government and the taliban, it is taken more than a year of difficult negotiations to reach this point and in the afghanistan area, they are daring to hope that this deal which is about a phased and conditional pull out of us troops in exchange for security guarantees can at least bea for security guarantees can at least be a first step away from war and towards peace. My colleagues, the bbc correspondent in pakistan afghanistan in the northeast of afghanistan, where they are daring to hope. Soldiers guarding the city that is nearly falling to the tele band three times in the past five years. It is in rural areas like this that much of afg hanistans it is in rural areas like this that much of afghanistans war is fought. The road we are driving along as currently controlled by the government but until recently, this was all tele band territory. The only reason we have been able to come here is because of the reduction in violence being in place. This was once the school in the village, then the taliban took it over as their main base. Before was flattened in an air strike, targeting the militants. Many residents are only now starting to move back after months of fighting between the government and taliban forces. Look over here, this is where a mortar landed. Me and my wife are sitting here, and she got hurt in the neck. Another one landed over there. We are poor people who cannot afford to rebuild all of this. But there is cautious optimism, the tele band looks at the sign an agreement with the us. Breaking links of alqaeda in exchange for the promise to withdraw american troops. I am hopeful, exchange for the promise to withdraw american troops. Iam hopeful, i have a tv and i watch the news. Whenever they see peace will come will fill us with joy. For the moment though, soldiers of the entrance continued to search for tele band infiltrators. The us tele band infiltrators. The us tele band infiltrators. The us tele band agreement alone will not bring peace. A cease fire in the countries political future will have to be established in talks between the insurgents and other afghanistan leaders to start next month. That is the checkpoint and the family lived alone. But they are hopeful that negotiations will end the violence. In the country has seen false starts before. If you look at the path, then the soviet union then pulled out of afghanistan, walked back the peace negotiations in the field. A civil war started in the country became what it is now. We are little sceptical of this process, but god willing, history will not repeat itself. In the city centre, a small demonstration calling for peace. There is new hope in this old conflict. Climate activist Greta Thunberg has warned Global Leaders that she will not be silenced when the world is on fire. The swedish teenager was addressing a crowd of about 20 thousand people who attended a Climate Change rally in bristol in the uk. Hundreds of children are believed to have skipped school to attend the march. Jon kay reports. Greta thunberg even she seemed overwhelmed by the size of this crowd. Thank you so much every single one of you for being here. In the middle of the school day, thousands of pupils walked out of lessons to be here. I will not be silenced while the world is on fire. Will you . World leaders are behaving like children, so it falls on us to be the adults in the room. The things she says are so impactful and so emotional. Yeah, i feel like it is a very emotional event. To see her here is amazing. She is so small. To hear her voice actually gets me. The crowd is just amazing. The rally and march that followed were organised by teenagers injust one week after Greta Thunberg got in touch. Police had warned that safety may not be adequate, with no idea how many young people would turn out. This is what is known as the greta effect, and the organisers, the authorities, this whole city, seem overwhelmed by the protest. Sasha is ten. Are you frightened . A bit. I am frightened that i will lose my dad and i am frightened that the planet is going to die soon because of some people whojust wont really care that much. The sixth formers who organised the event say its success is proof that this should be taken seriously. It has been manic. It has been a lot, but we pulled off so much in the eight days we have had. Itjust goes to show that individuals when they get together for a cause a good cause Amazing Things can happen. But with roads closed and buses cancelled some questioned if a School Strike should be encouraged. How much difference does it make . Nothing. It isnt going to do nothing. Whatever they are doing today, nothing can happen. But her fans say this is what education should be about. Greta thunberg has certainly left her mark here. Chetan pathak has all the sport. Thank you band for eight years after missing a doping test in 2018, it is been a long running story which is seen in the world governing body being criticised too. Initially band three months for taking a banned substance in 2014 that some thought was lenient. Returning to when a heap of metals, including gold at rio 2016. Two years later, he missed an out of competitions drugs test and argued with officials. In a few months later in january, with officials. In a few months later injanuary, the world governing body cleared him of any wrongdoing in the road Anti Doping Agency appealed that decision and the court of arbitration got its way. With him being handed an eight year suspension on friday, he said he will appeal that near the thoughts of former olympic silver medallist. Im really pleased. I think it is sent a very strong message switch so we need in sport, front to deter people from trying to cheat the system, im very disappointed that the swimming body did not do this way back at the beginning of last year so that the World Championships were not ruined. But it is good but it is been done at last. Bottom Club Norwich City desperately need a win in the premier league tonight. Theyre at home to lecicester and go into the match six points off their nearest rivals, and eight points points from safety theyre about 15 minutes into ther action at carrow road no jamie vardy for leicester because of a calf injury. Getting your hands on an English Premier League winners medal must go down as one of the greatest achievements in any footballers career. Its going to feel even better for sadio mane because he didnt realise players get their own one. His goals are a big reason why liverpool are 22 points clear at the top of the table going into saturdays game at watford. Theyre four wins from the title, and the man from senegals been telling us hes come a long way himself to be here today and be in front of those people. Its in the working from my life and still, if i want to, the same time, i am, i think yesterday that if we win the league, well have a winner. So i will do her target from beginning and after this, if we make it here, i think will be to be good for the cloud and for the fans. Indias cricket coach ravi shastri says theres no need to panic following their 10 wicket defeat to new zealand in the first test in wellington. The batting order collapsed in both innings with Cheteshwar Pujara receiving criticism for his slow tempo. Speaking ahead of the second test, which gets underway later on friday in christchurch, shastri says the first test serves as an important learning experience and confidence is still high we had a great run in the test arena. We played eight and 17. So one must is not, it is absolutely no need to panic and when you look at this, no one is looking that direction. There will have learned what to expect and they know what to expect and mentally tuned. Thats all the sport for now. Beatles fans will be familiar with this. Its the famous Pedestrian Crossing outside abbey road studios in london which featured on their 11th album and you might recognise two of these faces. Prince harry and jon bonjovi, along with two members of the Invictus Games choir, mimicking the fab four. The american rocker is re recording one of his songs with the dukes invictus charity bonjovi saying he looked forward to working with the artist formerly known as prince. A reminder of our top story. Coronavirus has cause another frantic day on global markets, thereve been sharp falls in stock markets around the world as the outbreak sparks fears of a worldwide recession. More than five trillion dollars have been wiped off global share values this week. The markets have had their worst 7 days since the Global Financial crisis more than a decade ago. Meanwhile the World Health Organisation has raised its assessment of the coronavirus threat to the highest level. More than fifty nations have now reported cases. Dont forget you can get in touch with me and some of my team on twitter im lvaughanjones hello there. Another weekend with another named storm said to bring wet and windy weather. If already seen the spell of rain this going to be more rain overnight as well and that could lead to some further flooding to stop it is notjust rain that we have seen, theres been some snow briefly across the hills of Northern England and into scotland. A lot of that is been turning to rain and we have the next band of rain and we have the next band of rain coming in from the west and this is the picture later on in the night and heavy rain coming in from the atlantic accompanied by some strong and gusty winds as well. The heaviest of the rain is likely to be over the hills in the western parts of england and across wells. Just what we do not need it but the hills of wales after the rain today and tonight, it could be over 70 mm of rain. By the morning tomorrow, the range of cleared away from these areas. Sweeping away from eastern england, moving away from the mainland of scotland and sunshine follows a nd mainland of scotland and sunshine follows and then the showers as the wind picks up and whether across Northern Ireland in southern scotla nd Northern Ireland in southern scotland with some snow over the hills. Here we see temperatures of four or hills. Here we see temperatures of fouror5 hills. Here we see temperatures of four or 5 degrees for the stuff that is because the wind is picking up andi is because the wind is picking up and i will make it feel cold widely windy here by the end of the afternoon of the wind coming from storm jorge and that will bring the rain and then the ones to be strengthened throughout saturday. And this is where the winds will be at their peak later on on saturday into saturday night, gusts of up to 75 miles an hour particularly when those heavy showers come along that wet weather discussing moving its way northwards into the colder air in scotland. That is to refine the storm moving into sunday, should be weakening by the stage so the winds will not be quite as strong but the weather friend here will bring some Winter Weather through the English Channel and into southern and particularly southeastern parts of england later in the day. But across northern scotland will receive the wet weather and heavy snow falling in the highlands. A lot of snow here. And for the south, whence do tend to ease a bit but therell be some sunshine, some showers over the hills and temperatures prep as high as eight or 9 degrees. Enter next week, does not look as windy however there will some sunshine and showers again, wintry in the hills. This is bbc world news, the headlines. Fears about the Economic Impact of the coronavirus have driven stock markets further down around the world. Its been the worst week for stocks since the financial crisis of 2008. The World Health Organisation has upgraded the global risk of the Virus Outbreak to very high. More than 50 countries are now reporting cases. Nato has called on russia and syria to stop their offensive in syrias Idlib Province and halt what it called their indiscriminate air attacks. It comes after 33 turkish troops were killed, in what ankara says was a syrian air strike. And one of the Busiest Railway stations in paris has been partially evacuated after a large fire was inadvertently started by demonstrators. But firefighters say they are bringing