A 37-year-old Chinese national, who was travelling as part of a tour group in Australia, has tested positive for the virus and is in isolation at the Gold Coast University Hospital, Queensland Health said in a statement.
The state’s four other cases, including a 44-year-old man, a 42-year-old woman, a 37-year-old man and an 8-year-old boy, were travelling in the same group. All five are in a stable condition, chief health officer Dr Jeannette Young said.
The tour group travelled to Melbourne from Wuhan, in China’s central Hubei Province, via Singapore on January 22.
They spent five days in Melbourne before flying to the Gold Coast on Tigerair flight TT566 on January 27.
It is not clear where they went in Melbourne, but they had not felt unwell at the time.
The 44-year-old male was the first to be diagnosed with the virus on January 29.
Four others from group are now being held in isolation at the hospital.
Queensland Health is in the process of contacting other passengers who travelled on the same Tiger Airways flight.
Passengers have been advised to self-isolate in their homes or hotels and be alert for symptoms including fever, couth, sore threat, fatigue and difficulty breathing and contact a GP if necessary.
Fifteen people have now been infected with the virus in Australia, including four people in New South Wales, four in Victoria and two in South Australia.
More than 28000 people have infected globally and 563 people have died.