The number of worldwide coronavirus cases has continued to rise, as stock markets across the globe plunged to record lows in the face of mounting fears around the disease’s spread.
A host of countries reported their first infections on Friday, as Nigeria became the first in sub-Saharan Africa to do so.
Meanwhile, Bank of England Governor Mark Carney said Britain should prepare for a financial fallout while Wall Street endured its biggest one-day drop in nine years.
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While the governing body is insistent the competition will kick off in Rome on June 12, sources on the political side maintain there is a definite possibility the tournament could be altered or even postponed.
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The measure has been introduced after two Italians in the country for the UAE Tour cycling race tested positive for the coronavirus.
Scores of fellow professional cyclists, including four-time Tour de France winner Chris Froome, have been staying at the hotels and are now isolated in their rooms.
"We are co-operating with the relevant authorities as they take precautionary measures but no diagnosis has been confirmed," a spokesperson for Crowne Plaza in Yas Island said.
"We will update our existing guidance to reflect any specific arrangements schools and colleges should put in place if required. In the meantime, students, schools and colleges should continue to prepare for the summer exams and assessments as usual."
At least 23 guests left a Tenerife hotel in several small groups on Friday, four days into a 14-day quarantine imposed because of the coronavirus, Reuters is reporting. Around 700 holidaymakers remained stranded in the compound.
The Canary Islands regional government on Thursday cleared 130 holidaymakers to leave the hotel. The rest of the group will be allowed to leave in the coming hours, according to a statement from the H10 Costa Adeje Palace.
It was not clear where Friday's groups were being taken, although one bus driver told TVE television he was taking his group to the airport.
An elderly couple could be seen leaving in an ambulance. But the authorities said there have been no new cases since the virus was detected in four Italian tourists earlier this week.
Half a dozen guests, including a baby in a pram, underwent temperature scans in the back of the hotel before boarding the first minibus, a video, shot by hotel guest Christopher Betts, showed. One of the people boarding said he was from Belgium.
Spain now needs to liaise with the governments of the remaining hundreds of guests, to establish monitoring protocols before they are allowed to return home, local health authorities confirmed on Friday.
Stocks are opening sharply lower on Wall Street, putting the market on track for its worst week since October 2008 during the global financial crisis.
US indexes fell 1.8% following steep losses in Europe and Asia. The rout is driven by fear that the virus that emerged in China will derail the global economy.
Investors continue to buy up low-risk assets like bonds, sending yields to record lows.
The Dow Jones Industrial Average lost 463 points, or 1.8%, to 25,311. The S&P 500 lost 54 points, or 1.8%, to 2,922. The Nasdaq fell 143 points, or 1.7%, to 8,423.
Germany's DAX skidded as much as 5% before stabilizing, Tokyo and Shanghai closed 3.7% lower.
Investors had been growing confident the disease that emerged in China in December might be under control. But outbreaks in Italy, South Korea, Japan and Iran have fueled fears the virus is turning into a global threat that might derail trade and industry.
But in the rest of China, the death rate has been 0.7 per cent. On average, the death rate from seasonal flu is about 0.1 per cent.
The prime minister is under fire for waiting until next week to chair his first meeting of the Government's Cobra contingencies committee.
A No 10 spokesman said this followed the sharp increase in the number of cases of Covid-19 in mainland Europe - prompting fears it is only a matter of time before they start rising in the UK.
But Labour again accused Mr Johnson of acting as a "part-time prime minister", saying he should be taking action immediately to take control of the situation.

Shadow health secretary Jonathan Ashworth said: "Our part-time prime minister needs to get a grip of this escalating situation quickly. It shouldn't take another three days for this meeting to take place."
Former chancellor George Osborne said Mr Johnson should be chairing a daily Cobra meeting, saying the public needed to know that ministers had the situation under control.
"The British Government now needs to go onto a 'war footing' with the coronavirus: daily NHS press briefings, regular Cobra meetings chaired by the PM, ministers on all major media shows," Mr Osborne, who now edits the London Evening Standard, tweeted.
A man who had been in Italy, and showed positive in an initial test in Mexico City, went through a second test that turned up positive results early on Friday, deputy health minister Hugo Lopez-Gatell Ramirez told reporters. The man is in isolation, he added.
His case is connected to a second confirmed case in the northern state of Sinaloa, Mr Lopez-Gatell added.
"Due to the epidemiological association with the other case, it is confirmed," he told a news conference.
The Latin Patriarchate of Jerusalem announced the measures on Thursday, shortly after the start of Lent, the 40-day season that leads up to Easter. Millions of pilgrims frequent Jerusalem and other holy cities such as Nazareth and Bethlehem each year.
Archbishop Pierbattista Pizzaballa, the Vatican's apostolic administrator, said in a statement that with its many visitors the Holy Land is in a "unique situation".
The guidelines include "receiving Communion by hand only", rather than placing the wafer directly on the recipient's tongue, and avoiding "having the faithful receive Communion from the chalice".
The coronavirus could reach most “if not all countries”, the World Health Organisation said on Friday, after Nigeria confirmed sub-Saharan Africa’s first case.
“The outbreak is getting bigger,” WHO spokesman Christian Lindmeier told a Geneva news briefing on Friday. “The scenario of the coronavirus reaching multiple countries, if not all countries around the world, is something we have been looking at and warning against since quite a while.”
Mr Lindmeier added that the WHO was looking into reports of patients being re-infected.
“We need to carefully look at how the tests were taken, how the person was examined, if it was maybe overlooked that the person still had the virus somewhere in the residue in the body, whether they got reinfected by different means or ways," he said. "We’re not in a position to say it is possible or not to be coming back and being re-infected.
“In general, we would expect that a person who had the coronavirus infection would be immune for at least a while afterwards. But again this is something we do not yet know.”
He is the first Briton to have died from coronavirus, also known as Covid-19.
A total of 19 British nationals have been diagnosed with the illness.
The vast majority of infections were in three provinces: Tehran, 128, Qom, 88, and Gilan, 65, according to a map published by the official IRNA news agency citing health ministry figures.
Iran cancelled Friday prayers in the capitals of 23 of Iran's 31 provinces because of the coronavirus outbreak.
Tehran, the national capital, and the holy cities of Qom and Mashhad were among places where authorities called off Friday prayers.
Those infected in Iran include Deputy Health Minister Iraj Harirchi and Masoumeh Ebtekar, vice president for women and family affairs.
The Islamic Republic is the only country in the Gulf region that has reported deaths from the coronavirus, which has spread from China, but people have been infected in Kuwait, Bahrain, the United Arab Emirates and Oman.


First Briton dies of coronavirus on cruise ship quarantined in Japan, reports say
A British man who was aboard the quarantined Diamond Princess cruise ship in Japan has died from coronavirus, local media reportsRomania has confirmed two more cases of coronavirus since Wednesday, the country's deputy health minister has said, bringing the total number of cases to three.
"They are a 45-year-old man from the county of Maramures and a 38-year-old woman from [the western city of] Timisoara. They both tested positive for the virus," Nelu Tataru said. "They recently returned from Italy."

- The coronavirus outbreak is "getting bigger", the World Health Organization (WHO) said on Friday after Nigeria confirmed sub-Saharan Africa's first case, reiterating its warning that the virus could reach most "if not all countries"
Overall, 130 guests from 11 countries have been told by Spanish authorities that they can leave, because they arrived at the hotel on Monday - after those who tested positive had been taken to hospital.


