Police have already been called in to enforce at least one case of coronavirus-prompted self-isolation as the number of cases in NSW jumps by 22 people in 24 hours.

Prime Minister Scott Morrison announced on Sunday that from midnight all people coming to Australia will have to self-isolate for 14 days.

NSW Premier Gladys Berejiklian called for the community to take the directive on board.

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Under the state’s Public Health Act both Health Minister Brad Hazzard and Emergency Services Minister David Elliott have the power to enforce these self-isolation provisions, Ms Berejiklian told reporters in Sydney on Sunday.

“At this stage we believe that the provisions in the Public Health Act satisfy what we need to do,” Ms Berejiklian said.

What is the coronavirus?

Coronaviruses are a group of viruses that can cause a range of symptoms including a runny nose, cough, sore throat and fever. Some are mild, such as the common cold, while others are more likely to lead to pneumonia.

The latest strain was discovered in the Chinese province of Wuhan.

How do you get coronavirus?

China says the virus is mutating and can be transmitted through human contact.

It’s primarily spread through a sick person coughing or sneezing on someone but a person could also become infected through contact with the virus particles on a surface, NSW Health warns.

What are coronavirus symptoms?

Symptoms include fever, cough and difficulty breathing. Most of those affected are older people and those with underlying health conditions.

How dangerous is the coronavirus?

The virus has caused alarm because it is still too early to know how dangerous it is and how easily it spreads between people.

How do you treat coronavirus?

As it stands, there is no vaccine for the virus and, because it is new, humans have not been able to build immunity to it.

A group of Melbourne researchers have been tasked with finding a vaccine, while China is testing the HIV drug Aluvia as a treatment.

Where can I find further information on coronavirus?

There is a coronavirus hotline, 1800 020 080

The Coronavirus Health Information Line operates 24/7.

The Federal Government’s Health Department also has a dedicated coronavirus page on its website.

How do I protect myself from coronavirus?

WHO’s standard recommendations: