A live map is tracking the spread of coronavirus as a surge in infections in Italy, South Korea and Iran sparks fears of a global pandemic.
Almost 80,000 have been infected with the flu-like illness as of Monday and most of those cases and the 2,626 deaths have occurred in China, where the outbreak began in December.
South Korea has seen its cases double to 833 in recent days, with many linked to a 'doomsday cult' and a devout worshipper known only as "Patient 31".
Three more people have died in Italy - bringing to six the total number of fatalities - and that country now has the third-most cases in the world, with 215.
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Britain now has 13 cases after confirming four new infections on Sunday.
The SARS-like coronavirus has spread to almost every continent and there are fears that it could arrive in South America during Rio's Carnival, which began on Saturday.
The live map was created by researchers at Johns Hopkins University in the US.
It puts the latest global tally at 79,524 cases of Covid-19. Of those, 77,150 are in mainland China.
In the top five, China is followed by South Korea, Italy, Japan (154) and Singapore (89).
Rounding out the top ten are Hong Kong (79), Iran (61), Thailand and the US (35 each), and Taiwan (30).
Researchers say 25,160 people who were diagnosed have gone on to fully recover, including eight people in the UK.
Johns Hopkins' live map uses data from the World Health Organisation and the US Centers for Disease Control.
Britain's Department of Health said that as of Monday afternoon, 6,536 people have been tested in the UK for coronavirus, of which 6,527 have been negative and nine positive.
These figures do not include the four positive cases from the Diamond Princess cruise ship who were held in quarantine in Yokohama, Japan, and are now in the UK.
Downing Street insisted the UK was "well prepared" and said the risk to individuals in the UK remains low.
The World Health Organisation is worried about the lack of an obvious link between China and newer cases in Italy, South Korea and Iran, and some scientists say the virus can be passed on easily and by those with no symptoms.
In Italy, around 50,000 people are affected by a lockdown in the regions of Lombardy and Veneto, as the country reports more than 160 cases - the largest number in Europe.
The Foreign Office has not advised Britons against travel to Italy, but has updated its website with factual information about the situation there.
Asked whether the UK could put in place restrictive measures such as those seen in Italy to combat the spread of the disease, Prime Minister Boris Johnson's official spokesman said: "We will be led by the advice from public health and medical experts and will take steps which they feel are required to best protect the British public.
"We are well prepared for UK cases, we are using tried and tested procedures to prevent further spread and the NHS is extremely well prepared and used to managing infections.
"We continue to work closely with the World Health Organisation and international partners as the situation develops and we remain prepared for all eventualities."
WHO spokeswoman Margaret Harris said the organisation will not officially declare a pandemic, but will start to use the term in communications if it reaches that stage.
She added: "We could start describing it as a pandemic but at the moment we are saying it is clusters and outbreaks in some countries."
Ms Harris said in most cases there was a clear epidemiological link between those affected and cases reported in Asia.
"If it became clear that it is all around the globe and we are seeing systematic community transmission, then we would say this meets the definition of a pandemic," she added.
