Like cold and flu bugs, the new virus is spread via droplets when a person coughs or sneezes.  The droplets land on surfaces and are picked up on the hands of others and spread further. People catch the virus when they touch their infected hands to their mouth, nose or eyes.

It follows that the single most important thing you can do to protect yourself is to keep your hands clean by washing them frequently with soap and water or a hand sanitising gel.

Also try to avoid touching your mouth, nose or eyes with unwashed hands – something we all do unconsciously on average about 15 times an hour.

Other tips include:

Coronaviruses are a family of viruses that cause disease in animals. Seven, including the new virus, have made the jump to humans but most just cause common cold-like symptoms.

Two coronaviruses – Middle East respiratory syndrome (Mers) and severe acute respiratory syndrome (Sars) – are much more severe, having killed more than 1,500 people between them since 2002.

The new virus, known as Wuhan coronavirus (2019-nCoV), is also more dangerous. So far, around 15 to 20 per cent of hospital cases have been classed as “severe” and the current death rate stands at about two per cent.

This is much lower than Mers or Sars but still a significant threat.

According to the NHS and the WHO, symptoms of the Wuhan coronavirus usually include:

These symptoms are similar to other respiratory diseases, including flu and the common cold. So if you have symptoms consider the following:

Symptoms are thought to appear between two and 10 days after contracting the virus. 

There is also some evidence, as yet unconfirmed, that the virus can be spread by asymptomatic people - that is people who carry the virus but are not yet sick.

If this is correct it will make the virus considerably more difficult to control.

If you have travelled to Wuhan City in China (or another significantly affected area)  in the last two weeks, or have been in contact with someone who has and feel unwell, call NHS 111 for advice now.

Do NOT go straight to a doctor’s surgery or hospital as, if you have the virus, you risk spreading it to others.

The NHS is asking anyone returning from Wuhan to “self-quarantine” themselves for two weeks, that is stay away from work and other busy places and take care interacting with others.

Probably not, but they are by far the most common risk. 

The NHS is advising doctors that the virus is also likely to be contained in other bodily secretions including in blood, faeces and urine. 

Here again, hand and surface hygiene is the key.

Children are a major vector for the spread of droplet-based viruses because they interact physically so much with each other and are not the best at keeping themselves clean.

However, you can greatly lower the risk that children pose of spreading or catching viruses by:

Paper face masks are not generally recommended by the NHS for ordinary citizens – with good reason. 

They are ill-fitting and what protection they might initially provide soon expires. Worse, they quickly become moist inside providing the perfect environment for germs to thrive in. They also become a hazard for others if carelessly discarded.

However, an exception to this would be if you were displaying symptoms such as coughing or sneezing – then a mask may help prevent you spreading the virus to others in busy locations.

In hospitals, healthcare workers treating patients with the virus will wear masks but these are specialist devices and there are strict protocols they must follow to ensure they remain safe and effective.

There is no simple cure for the new coronaviruses – just as there is no cure for the common cold.

In more severe cases, the virus causes pneumonia, an infection that inflames the lungs and causes breathing difficulty. This is where the main danger lies.

Viral pneumonia cannot be treated with antibiotics and, for the moment at least, there are no antivirals specific to this particular virus.

Instead doctors focus on supporting patients' lung function as best they can. They may be given oxygen or placed on a breathing machine (ventilator) in the most severe cases.

Other symptoms such as fever and discomfort will be treated using 🤬 such as aspirin and ibuprofen. Secondary infections may be treated with antibiotics.

Data from China suggests that people of all ages are at risk of contracting the virus .

However, as with most respiratory illnesses, it is likely to be the young and old who are most at risk once infected. People with a reduced chance of surviving pneumonia include:

As data accumulates, a much clearer picture of the particular risk groups for the new virus will emerge and will be updated here.

There is currently no vaccine but researchers in the US, UK and China have already begun working on one, thanks to China's prompt sharing of the virus's genetic code. 

However, any potential vaccine will not be available for up to a year and would most likely be given to health workers most at risk of contracting the virus first.

For now, it is a case of containment. China has started building several  1,000-bed hospitals to treat patients which it hopes to finish within days.

Capacity to treat patients who require both ventilation and isolation will also be the biggest challenge for the NHS if the virus takes hold in the UK.

In addition to the advice on symptoms above, the British government has been advising against "all but essential" travel to Wuhan. 

The Foreign and Commonwealth Office is also evacuating British citizens in the area. If you are a British national in Hubei Province and require assistance, please contact:

Public Health England has announced “enhanced monitoring of direct flights” from China and has a small rota of doctors on hand at Heathrow to provide information and deal with possible cases.

In other major hub airports around the world, the authorities have gone further and are checking passengers temperatures on arrival and distributing hand sanitisers to combat the spread of the virus.  

Good quality research suggests that hand cleansing at Heathrow and nine other global air hubs could slash the spread of the virus spread by up to 40%.

The best place to sit is at a window seat in the middle of the cabin, research suggests. This is is because it reduces your risk of being infected by droplets shed by people walking up and down the the aisles.

Coronaviruses and flu viruses might cause similar symptoms but genetically they are very different. 

“Flu viruses incubate very rapidly – you tend to get symptoms two to three days after being infected, but coronaviruses take much longer,” said Professor Neil Ferguson, a disease outbreak scientist at Imperial College London. 

“[With the] flu virus you become immune but there are lots of different viruses circulating. Coronaviruses don’t evolve in the same way as flu with lots of different strains, but equally our body doesn’t generate very good immunity,” he added. 

Chinese officials have warned that the virus is already starting to mutate, which means there’s a chance that the disease could start to infect many more people. 

“The worry is that if you have a new virus that is exploring a human host it’s possible that they might mutate and spread more easily in humans,” Jonathan Ball, professor of molecular virology at the University of Nottingham, told The Telegraph. 

The genetic sequence of the virus shows a slow mutation rate, said Prof Ferguson.

“Could it mutate to become more lethal and transmissible? That’s speculation,” he said.