So far, health officials do not consider the new virus from China to be as lethal as SARS, but the investigation is evolving and much is still not known about whether the virus can spread easily from person to person.
In the United States, the CDC began additional health screening Friday at the three major airports in Los Angles, New York and San Francisco, for individuals who took a direct or connecting flight from Wuhan.
According to the statement from the CDC, the three US airports where enhanced screening is being done are the ones that receive most of the travelers here from Wuhan.
The Public Health Agency of Canada says additional measures will include messaging on arrivals screens at the Toronto, Montreal and Vancouver global airports reminding travellers from Wuhan to inform a border service officer if they are experiencing flu-like symptoms.
Right now, "we believe the current risk from this virus to the general public [in the U.S.] is low", said Dr. Nancy Messonnier, director of the CDC's National Center for Immunization and Respiratory Diseases.
The researchers said their estimate was largely based on the fact that cases had been reported overseas - two in Thailand and one in Japan. The outbreak comes at a time of increased travel in that region of the world as the start of the Chinese New Year begins January 25. The agency said that it may adjust screening procedures and other response activities as additional information is gathered about the new virus.
A deadly epidemic of the newly identified virus in central China has prompted airlines to carry out checks, raising fears of a new worldwide epidemic.
2019-nCov is a flu-like deadly virus that can cause symptoms leading from a severe cold up to pneumonia.
The Wuhan Municipal Health Commission said no new cases have been discovered in the city as of Wednesday and the number of known cases remain at 41. "The source also remains unknown", the World Health Organization said Friday.
Chinese health officials closed the market for cleaning and disinfection on January 1.
"For Wuhan to have exported three cases to other countries would imply there would have to be many more cases than have been reported". Since then, at least 45 people have been sickened by the disease, and two have died.
It said there is some "limited" human-to-human transmission of the virus.
What do we know about this new type of coronavirus?