A new SARS-like virus has killed 17 people in China, infected hundreds and reached as far as the United States, with fears mounting about its spread as hundreds of millions travel for Lunar New Year celebrations, which start Friday.
The World Health Organization on Wednesday decided to extend by a day emergency talks on a deadly outbreak of a SARS-like virus originating in China, postponing its decision on whether to declare a global public health emergency.
"The decision about whether or not to declare a public health emergency of international concern is one I take extremely seriously and one I am only prepared to make with appropriate consideration of the available evidence," WHO chief Tedros Adhanom Ghebreyesus told reporters.
Many countries have stepped up screening of passengers from Wuhan, the Chinese city identified as the epicentre, and the WHO has called an emergency meeting.
Chinese state media say the city of Wuhan is shutting down outbound flights and trains as the country battles the spread of a new virus that has sickened hundreds and killed 17.
The official Xinhua News Agency said Thursday that the city also asked people not to leave Wuhan without specific reasons.
Here's what we know so far about the virus:
It's entirely new
The pathogen appears to be a never-before-seen strain of coronavirus — a large family of viruses that can cause diseases ranging from the common cold to Severe Acute Respiratory Syndrome (SARS), which killed 349 people in mainland China and another 299 in Hong Kong between 2002 and 2003.
Arnaud Fontanet, head of the department of epidemiology at the Institut Pasteur in Paris, told AFP the current virus strain was 80 percent genetically identical to SARS.
China has already shared the genome sequencing of this novel coronavirus with the international scientific community.
It has been named "2019-nCoV".
It's being passed between humans
The WHO said Monday it believed an animal source was the "primary source" of the outbreak, and Wuhan authorities identified a seafood market as the centre of the epidemic.
But China has since confirmed that there was evidence the virus is now passing from person to person, without any contact with the now-closed market.
The virus has infected more than 400 people across the country, with most cases in Wuhan, according to officials. Li Bin of China's National Health Commission on Wednesday said 1,394 people were still under medical observation.
Doctor Nathalie MacDermott of King's College London said it seems likely that the virus is spread through droplets in the air from sneezing or coughing.
Doctors at the University of Hong Kong published an initial paper on Tuesday modelling the spread of the virus which estimated that there have been some 1,343 cases in Wuhan — similar to a projection of 1,700 last week by scientists at Imperial College, London.
Both are much higher than official figures.
It is milder than SARS
Compared with SARS, the symptoms appear to be less aggressive, and experts say the death toll is still relatively low.
"It's difficult to compare this disease with SARS," said Zhong Nanshan, a renowned scientist at China's National Health Commission at a press conference this week. "It's mild. The condition of the lung is not like SARS."
However, the milder nature of the virus can also cause alarm.
The outbreak comes as China prepares for the Lunar New Year Holiday, with hundreds of millions travelling across the country to see family.
Professor Antoine Flahault, director of the Institute of Global Health at the University of Geneva, told AFP that the fact that the virus seems milder in the majority of people is "paradoxically more worrying" as it allows people to travel further before their symptoms are detected.
"Wuhan is a major hub and with travel being a huge part of the fast approaching Chinese New Year, the concern level must remain high," said Jeremy Farrar, Director of the Wellcome Trust.
International public health emergency?
The WHO will hold a meeting on Wednesday to determine whether the outbreak constitutes a "publRead More – Source