They say they're introducing tighter checks at three global airports before the Chinese holiday season begins next week.
"This is the stage of the investigation where we need to proceed cautiously and be prepared for any eventuality", said Dr. Nancy Messonnier, an expert in respiratory diseases at the Centers for Disease Control and Prevention (CDC) in the US.
A World Health Organization doctor has said it would not be surprising if there was "some limited human-to-human transmission, especially among families who have close contact with one another".
Amy Poehler and Tina Fey to Host 2021 Golden Globe Awards
Poehler served as a presenter at this year's awards, alongside Taylor Swift when they presented the award for best animated film. PASADENA, Calif. (AP) - Tina Fey and Amy Poehler will share host duties for the Golden Globes ceremony in 2021.
Its symptoms include a runny nose, headaches, coughing, sore throat, fever and a general feeling of being unwell.
The four individuals were diagnosed with pneumonia on Thursday and are in stable condition, the Wuhan Municipal Health Commission said in a statement published shortly after midnight, a day after it confirmed the death of a second patient.
Five people are treated as "severe cases", it said.
In China, authorities have confirmed 41 people have the novel coronavirus and two deaths have occurred so far.
SpaceX now operates the world's biggest commercial satellite network
A special coating on the bottom of Starlink satellites could reduce the glare but how it will affect performance is unknown. The launch was broadcast live by SpaceX , a company created by tycoon Elon Musk , who is also chief executive of Tesla.
Authorities in Wuhan said a seafood market was the centre of the outbreak.
Coronaviruses are a family of viruses that can cause a variety of ailments, among them the deadly severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS). Kyodo News agency reported the man is Chinese.
In a media statement yesterday, the Ministry of Health (MOH) said that the 69-year-old male Singaporean has been admitted for further assessment and treatment.
January 14 2020: The WHO told hospitals around the globe to prepare, in the "possible" event of the infection spreading. "It is probable that we are looking at patients being affected over a number of days from multiple animal sources and with some degree of human-to-human transmission", said Farrar. The Wuhan health authorities said transmission between humans "cannot be ruled out".
French police shoot dead man near Paris after stabbing attempt
One person was killed and several injured by a man with a knife in Villejuif , south of Paris , according to the AFP news agency. Local media have said that one of the victims has died, while two others have been taken to hospital with serious injuries.
In Vietnam, a 22-year-old man and a 3-year-old boy are being tested for the new corona virus.