An eight-year-old boy has been confirmed as Queensland's third case of the potentially deadly coronavirus.

Key points: The boy is the first child in Australia confirmed to have coronavirus

The boy is the first child in Australia confirmed to have coronavirus He was travelling in the same tour group as the two other confirmed cases in Queensland

He was travelling in the same tour group as the two other confirmed cases in Queensland The number of deaths in China has risen to over 400, with over 20,000 infected on the mainland

The child, who is Chinese and from the virus epicentre of Wuhan, was confirmed to have the virus by Queensland health officials on Tuesday night.

He was travelling in the same tour group as the 44-year-old man and a 42-year-old woman who have been confirmed as Queensland's other cases of coronavirus.

The child remains in isolation at the Gold Coast University Hospital and is currently stable.

The child is now the 13th person in Australia to be infected with the virus — there are four cases in NSW and Victoria and two cases in South Australia to go with the three in Queensland.

The boy is the first child to be diagnosed with the virus in Australia and the youngest by a wide margin, with other confirmed cases mostly occurring in people older than 30, though two in their 20s are also confirmed cases.

Two more Australians in China have also been infected with the virus.

The news comes as 240 Australian citizens and residents are being quarantined on Christmas Island, having been evacuated from Wuhan on a charter flight organised by the Morrison Government.

Some of those complained about the conditions at the centre, which they said had poor internet and a number of insects.

As of Tuesday, the number of deaths in China from the virus had reached 425 and there are 20,438 confirmed infections, according to the Associated Press.

The number of deaths internationally had risen to two after a person died from the virus in Hong Kong, following the death of a Chinese man from Wuhan in the Philippines on Sunday.

Testing expanded

Queensland Heath ramped up testing across the state in light of the new case.

Health Minister Steven Miles told State Parliament collection sites have been expanded to private pathologies.

"QML and Sullivan & Nicolaides Pathology are now equipped to collect samples from travellers who have been in China or anyone who might have been in contact with an infected patient," he said.

"This means most towns and suburbs in Queensland have somewhere that can take a sample to test for coronavirus."

Mr Miles said providing more collection points gave doctors more options.

"They can choose to collect samples themselves or refer to a collection point," he said.

"It makes testing much more accessible and should allay concerns from GPs."