An elaborate secret tunnel system and timed hospital operation drills at the coronavirus Arrowe Park HQ can be revealed by the ECHO.
Ninety-three people are staying at the two isolation buildings on the Wirral NHS site after arriving five days ago following the outbreak in Wuhan, China.
They must remain in the accommodation blocks for two weeks in quarantine.
Today, the ECHO has learned how an intricate structure has been set up in Birkenhead to stop any potential spread of the killer virus.
If any evacuee falls ill, separate to the coronavirus itself, and needs an operation, they will be whisked to a specialist and currently unused theatre room inside Arrowe Park.
And to get them there, a long tented tunnel will be quickly unfurled to ferry them from the isolation units onto the operating table.
That temporary subway will avoid any public areas of the hospital and lead directly to the doors of the surgical theatre.
Timed drills have been carried out by medics to test how long it might take to carry a patient from the accommodation areas to theatre.
After any operation anyone in the room, including surgeons or other medical support staff, would have to themselves be put into quarantine as a precaution.
NHS workers who have volunteered to take part in the complex surgical process are understood to be currently "on-call."
One well-placed source told the ECHO: "The amount of planning that's gone into this is amazing, they have thought of every scenario.
"Nobody has needed an operation, yet."
The Department for Health declined to comment.
Medical staff were first alerted about a potentially rare job opportunity arising around six days ago, but nothing was mentioned about coronavirus, or Arrowe Park.
But because calls were made to Merseysiders, it was then suspected the huge logistical exercise could be happening in the northwest.
It was revealed over the weekend that 11 more people would join the Wirral quarantine, raising the total to 93.
During their evacuation from China, one man became ill and was separated from the rest of the group.
Anthony May-Smith is being cared for in Oxford after feeling unwell as he made his way back to England.
He says he now feels "fine" after a cough and sore throat led to him being put in isolation.
Britons in mainland China have been urged to leave as coronavirus continues to claim more lives in the country.
The Foreign Office amended its travel advice after Health Secretary Matt Hancock said he expects more cases to be diagnosed in the UK.
Officials told the PA news agency the update was a prudent step in case more commercial airlines stopped flights out of China, or China extended travel restrictions.
Foreign Secretary Dominic Raab said: "We now advise British nationals in China to leave the country if they can, to minimise their risk of exposure to the virus.
"Where there are still British nationals in Hubei province who wish to be evacuated, we will continue to work around the clock to facilitate this."
Meanwhile, health officials are trying to trace 239 people who flew from Wuhan to the UK before travel restrictions associated with the outbreak came into force.
Chinese authorities said the death toll in mainland China from the coronavirus outbreak has risen to 425, with the number of cases now standing at 20,438.
