The human coronavirus is seen in this image made from a transmission electron microscopy view. Cavallini James/BSIP/Universal Images Group via Getty Images

A new Chinese coronavirus has infected hundreds since the outbreak began in Wuhan in December. Scientist Leo Poon, who first decoded the virus, thinks it likely started in an animal and spread to humans.

Here is what you need to know:

What is a coronavirus?

Coronaviruses are a large group of viruses that are common among animals. In rare cases, they can be transmitted from animals to humans.

Coronavirus symptoms

The viruses can make people sick, usually with a mild to moderate upper respiratory tract illness, similar to a common cold. Coronavirus symptoms include a runny nose, cough, sore throat, possibly a headache and maybe a fever, which can last for a couple of days.

For those with a weakened immune system, there's a chance the virus could cause much more serious respiratory tract illness like a pneumonia or bronchitis

How it spreads

Viruses can spread from human contact with animals. When it comes to human-to-human transmission of the viruses, often it happens when someone comes into contact with the infected person's secretions.

Coronavirus treatment

There is no specific treatment. Most of the time, symptoms will go away on their own. Doctors can relieve symptoms by prescribing a pain or fever medication.

How can you can prevent it

There is no vaccine to protect against this family of viruses, at least not yet. Trials for a MERS vaccine are underway.

You may be able to reduce your risk of infection by avoiding people who are sick. Try to avoid touching your eyes, nose and mouth. Wash your hands often with soap and water and for at least 20 seconds. If you are sick, stay home and avoid crowds and contact with others.

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