A Danish hospital revealed that it has isolated five people who displayed symptoms of a new viral respiratory illness that has been caused by a virus belonging to the same family as the deadly SARS virus.
"We have sent samples from the five for testing and hope to get the results this afternoon," chief physician Svend Stenvang Petersen of Odense University Hospital told AFP.
"The five have a fever, coughing and influenza-like symptoms," he added.
"We have put them in isolation because we don't know how the virus spreads. So just as with bird and swine flu we have admitted them and isolated them so that we prevent the spread to others," Petersen said.
"We do not have any medicine that works against this virus."
The five contacted their doctors following a Danish health authority advisory on Monday recommending that those who had travelled to Qatar and Saudi Arabia seek medical help if they experienced a fever, coughing, shortness of breath and difficulty breathing.
The new virus, which is in the same family as the Severe Acute Respiratory Syndrome (SARS) virus, was recently identified by the British Health Protection Agency in a Qatari man transferred to London from Qatar.
A Saudi national died earlier this year from a virtually identical virus, the World Health Organisation has said.
The WHO confirmed in a global alert on Monday that the new virus was in the coronavirus family which causes the common cold but can also include more severe illnesses including SARS.
SARS swept out of China in 2003, killing more than 800 people worldwide.