The infant boy is the son of a 40-year-old woman who tested positive for the disease after travelling to the state from Iran. Both are in stable condition at the Flinders Medical Centre.

The second new case is a 58-year-old man who arrived in SA from Taiwan on March 3.

The clinic at the Royal Adelaide Hospital will operate seven days a week, providing an outpatient service to ease pressure in emergency departments.

People who have travelled to countries with high coronavirus numbers or had contact with people known to be infected are encouraged to attend.

Premier Steven Marshall said the clinic was needed to stay ahead of the virus' spread.

"We can have the rapid assessment and testing of people who think they have contracted the coronavirus," Mr Marshall said.

SA Health's public health officer Nicola Spurrier said it was vital those with the disease were kept at distance from other vulnerable or ill people.

"Other people who get sick will come into the ED department so its important to have a separate service for people who have concerns and are developing symptoms," Ms Spurrier said.

SA Health is currently treating four patients for the coronavirus, including a 24-year-old woman who returned from Europe on March 1.

Australian Associated Press