All of the group - who had signed a contract agreeing to the quarantine period - have tested negative for the virus.
He added that she is now being treated at London's Guy's and St Thomas' hospital.
During a press conference on Tuesday, WHO director-general Tedros Adhanom Ghebreyesus said China's effort to contain the virus was the reason there have been so few global cases.
More than 80 people who stayed in accommodation at Arrowe Park Hospital in Wirral for two weeks have left after testing negative for COVID-19. She is now being treated in a London hospital.
The woman picked up the virus in China before arriving in London, the UK's chief medical officer Professor Chris Whitty has confirmed in a statement.
Reports say, the first case of Coronavirus has been confirmed after being diagnosed in London.
Earlier, Prof Cosford, from Public Health England, said people returning to the United Kingdom from travelling overseas could bring in further cases of coronavirus.
Steve Walsh, 53, contracted the virus in Singapore while at a business conference before going to the French Alps for a ski holiday, then returning to his home in Hove, East Sussex.
Officials have located 12 patients who had close contact with the Brighton doctors infected, one of whom worked in A&E on Tuesday and Wednesday last week at Worthing Hospital.
Health officials were bracing for more cases in the city of nine million, and were attempting to find relatives and acquaintances of the woman who may have come in contact with her since her infection.
It has also disrupted sporting events in China: motorsport's governing body FIA announced the suspension of the Formula One Grand Prix in Shanghai, originally scheduled for April 19, due to the "continued spread" of the coronavirus.
The total number of people infected with the deadly virus has risen to 47 in Singapore and it is by far the highest number of cases reported in any other country other than China.
The coronavirus outbreak reached new heights on Thursday as officials confirmed a total of 60,000 people had been infected worldwide.
The World Health Organisation's (WHO) director-general, Dr Tedros Adhanom Ghebreyesus, has warned that the outbreak "could still go in any direction".
The vast majority of deaths have been in mainland China, with 1068 of them in Hubei province, where the outbreak began.
And 44 more people on quarantined cruise ship the Diamond Princess in Japan have tested positive for Covid-19 disease.