Three more cases of the coronavirus have been confirmed in the UK, including the first one in Wales. Two new patients in England contracted the virus while in Iran, the Department of Health and Social Care said. Public Health Wales said it was working to identify close contacts of the Welsh patient, who is believed to be from the Swansea area and was infected in Italy before returning to the UK. The new cases bring the total number in the UK to 19. Wales' chief medical officer Dr Frank Atherton said "all appropriate measures" were being taken to care for the patient and reduce the risk of transmission. The patients in England are being treated at a specialist centre at the Royal Free Hospital in London. Northern Ireland also confirmed its first case on Thursday. Authorities said they have contacted passengers who sat near the woman on a flight from northern Italy to Dublin. Prime Minister Boris Johnson will chair a meeting of the government's Cobra emergency committee on Monday in response to a growing number of cases in Europe. Meanwhile, Bank of England governor Mark Carney has warned that the coronavirus outbreak could lead to a downgrade of the UK's economic growth prospects, in an interview with Sky News. It comes as airline Jet2 said British guests at a locked-down hotel in Tenerife would not be flown home until 10 March, unless they tested negative. Some 168 Britons were among hundreds of guests confined to the Costa Adeje Palace earlier this week. AFP reporter Dan Johnson said nine Canary Islands residents were allowed to leave the hotel on Friday because they arrived after four Italian guests with the virus had left. Experts have warned of school closures and the cancellation of major sporting events, concerts and festivals in the UK in a bid to stop the spread of the virus, which causes Covid-19. England's chief medical officer, Prof Chris Whitty, said on Thursday that transmission of the virus between people in the UK was "just a matter of time". He said if the outbreak intensifies, it may be necessary to close schools and stop mass gatherings of people for "probably more than two months". It is important to realise the UK does not have an "outbreak" of the coronavirus. We are dealing with the ripples of large, uncontrolled outbreaks elsewhere in the world. The cases announced on Thursday and Friday were all people who had been infected abroad before travelling to the UK - the virus is not spreading from person to person here. It means the UK's strategy remains one of containment - isolate any infected people and perform rigorous detective work to find and test anyone they come into contact with. Further cases are almost inevitable for as long as outbreaks in China, Italy, Iran, South Korea and Japan continue. The World Health Organization warned that the outbreak had reached a "decisive point" and had "pandemic potential". Globally, more than 80,000 people have been infected. About 2,800 have died - the majority in China's Hubei province.