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Wednesday, 12 February 2020

#Health : How dangerous is the new coronavirus?

How dangerous is the new coronavirus?

Global alarm mounts over a new type of a rapidly spreading coronavirus in China, but just how worried should you be? 

Medical staff attend to a patient infected by the coronavirus at a makeshift hospital at Wuhan International Convention and Exhibition Center in Wuhan City, Hubei Province [YFC CHINA OUT/ EPA]























The fast spread of a new coronavirus in China has prompted global alarm, with neighbouring states closing their borders, global airlines suspending flights and some governments barring entry to foreign nationals who have recently been in the Asian country.

The rapidly spreading virus, which is thought to have originated in the central city of Wuhan in late December and has since been detected in more than two dozen countries, has infected 40,171 people and killed at least 908 people in mainland China, as well as a person in Hong Kong and another one in the Philippines.

In a bid to limit its spread to countries with weak health systems, the World Health Organization (WHO) on January 30 declared the new outbreak a public health emergency of international concern. The United Nations' health agency, however, criticised the international travel curbs and flight suspensions against China, telling governments such measures must be "short in duration" and "proportionate".



Key questions answered

So just how dangerous is the new coronavirus, labelled 2019-nCoV, and how worried should you be?
The simple answer is we do not know enough yet and we will not know until more data comes in.

But experts say the key factors are how contagious the new virus is and what proportion of infected people become severely ill.
The new coronavirus is part of a family of viruses that include the common cold and the Severe Acute Respiratory Syndrome (SARS), which also originated in China in 2002.
It spreads primarily through droplets when an infected person coughs or sneezes, and can also be transmitted via contaminated surfaces.
According to Chinese statistics, about two percent of people infected with the 2019-nCoV have died so far. In comparison, some 10 percent of the 8,437 people infected with SARS during the 2002-2003 outbreak died, while the Middle East Respiratory Syndrome (MERS), which originated in Saudi Arabia in 2012, had a fatality rate of about 35 percent. 




Seasonal influenza outbreaks, meanwhile, kill less than 0.1 percent of people who fall ill, but as many as a billion people are estimated to catch the flu virus annually. That means between 290,000 and 650,000 people could die from the common cold every year. 
However, it may be too early to estimate fatality rates for the new coronavirus as we are still in the early stages of the outbreak.
And unlike the common cold, the new type of virus has no vaccine and no specific medicine recommended to prevent or treat it.
Another key measure in judging the danger of the new virus is its transmissibility.
According to an analysis published on January 26 by scientists at Harvard University in the United States, each infected person could pass on the new virus to up to three people on average, making it as contagious as SARS.



However, new data since then suggests the virus could be far more infectious - it has spread to more than 28,000 people within weeks of its detection, outstripping the total from the months-long SARS .
outbreak.

WHO says it is people living or travelling in the area where the virus is circulating who are at risk of infection. At present, the virus is circulating in China, and those infected from other countries are among people who have recently travelled there or who have been living or working closely with those travellers.
This suggests the risk to most people outside China is low.
Citing preliminary information, WHO also says the amount of time the virus survives on surfaces appears to be a few hours. "Simple disinfectants can kill the virus making it no longer possible to infect people," according to the agency.
And while there is still much more we need to learn about how the new coronavirus affects people, it is older people and people with pre-existing medical conditions who are more at risk of becoming severely ill, according to WHO.
To protect against any viral illness, the global health agency recommends that people wash their hands frequently, and avoid touching their eyes, nose and mouth to minimise risk of transmission. It also recommends covering the mouth and nose while sneezing and coughing, and seeking medical care in case of fever, cough and shortness of breath.

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