Two coronavirus cases in SA hospital

Christine McGinn

South Australia's first two cases of coronavirus are in isolation in hospital, bringing the number of confirmed cases in Australia to 12.

A couple in their 60s from the Chinese city of Wuhan, the epicentre of the outbreak, had been visiting family in South Australia.

"Two novel Coronavirus cases have been confirmed in SA in a 60-year-old male and a 60-year-old female," SA Health tweeted.

"They will both be in isolation at the RAH (Royal Adelaide Hospital) and are currently in a stable condition."

It came after Victoria confirmed its fourth case, earlier on Saturday.

SA Health chief public health officer Nicola Spurrier told reporters the pair was understood to have left Wuhan on January 20 to visit family in South Australia.

The pair developed symptoms, were tested at a South Australian public hospital and went into self-isolation. Their relative has also been tested, with the results still pending.

It is not believed the pair came in contact with anyone else in the state.

Prime Minister Scott Morrison also announced on Saturday a ban on all foreigners who have left or passed through mainland China entering Australia.

They won't be allowed to enter Australia for 14 days from the time they depart or transited through the Asian superpower, to prevent the spread of the virus.

Australians are also being advised not to travel to mainland China.