Disabled teenager in China dies at home alone after relatives quarantined

What is the virus causing illness in Wuhan? It is a member of the coronavirus family that has never been encountered before. Like other coronaviruses, it has come from animals, or possibly seafood. New and troubling viruses usually originate in animal hosts. Ebola and flu are examples.

What other coronaviruses have there been? Severe acute respiratory syndrome (Sars) and Middle Eastern respiratory syndrome (Mers) are both caused by coronaviruses that came from animals.

What are the symptoms of the Wuhan coronavirus? The virus causes pneumonia. Those who have fallen ill are reported to suffer coughs, fever and breathing difficulties. In severe cases there can be organ failure. As this is viral pneumonia, antibiotics are of no use. The antiviral drugs we have against flu will not work. If people are admitted to hospital, they may get support for their lungs and other organs as well as fluids. Recovery will depend on the strength of their immune system. Many of those who have died are known to have been already in poor health.

Is the virus being transmitted from one person to another? Human to human transmission has been confirmed by China’s national health commission. As of January 30, the death toll in China stands at 170, with 7,711 confirmed cases of infections. In the past week, the number of confirmed infections has more than tripled and cases have been found in 13 provinces, as well as the municipalities of Beijing, Shanghai, Chongqing and Tianjin. The virus has also been confirmed outside China, in Hong Kong, Macau, Japan, Nepal, Singapore, South Korea, Taiwan, Thailand, the US, and Vietnam. There have not been any confirmed cases in the UK at present, with the more than 70 people tested for the virus all proving negative. The actual number to have contracted the virus could be far higher as people with mild symptoms may not have been detected. Modelling by WHO experts at Imperial College London suggests there could be as many as 100,000 cases, with uncertainty putting the margins between 30,000 and 200,000.

How worried are the experts? There were fears that the coronavirus might spread more widely during the week-long lunar new year holidays, which start on 24 January, when millions of Chinese travel home to celebrate, but the festivities have largely been cancelled and Wuhan and other Chinese cities are in lockdown.

At what point should you go to the doctor if you have a cough, say? Unless you have recently travelled to China or been in contact with someone infected with the virus, then you should treat any cough or cold symptoms as normal. The NHS advises that there is generally no need to visit a doctor for a cough unless it is persistent or you are having other symptoms such as chest pain, difficulty breathing or you feel very unwell.