An 18-year-old woman in Brisbane has tested negative for the Ebola virus after arriving from West Africa 12 days ago and developing a fever on Saturday night.

She was transferred to an isolation unit at the Royal Brisbane and Women's Hospital and prior to that had been in home quarantine.

Queensland's chief health officer Jeannette Young said the woman was felling well, no longer has a fever, and very relieved.

She will remain in hospital until a second Ebola test on Wednesday.

Despite three Ebola scares in Queensland this year, Dr Young urged calm.

"There is no need to be nervous, we do know what we are doing and have the situation well managed," she said.

The woman was not a healthcare worker and was planning to stay in Australia indefinitely with her family.

She did not have any known contact with anybody who was sick with Ebola.

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She arrived in Australia on the weekend with her family of nine, which includes six children, though she was the only one in isolation.

"The others remain in home quarantine [in] the house they've been in since they've first arrived," Dr Young said.

The woman was transferred to the hospital by ambulance and Dr Young said she and her family did not pose a risk to the community.

"The other people in the house are quite safe," Dr Young said.

"They have a risk ... they're also in home quarantine because of their risk from when they were in West Africa, but the risk from her is minimal.

"There is no risk to the community at all because she hasn't left the house or had any visitors in the time that she has been here in Brisbane."

Dr Young said health authorities were notified of the family's arrival plans and processed them at the airport and organised home quarantine.

The family flew out of Guinea.

Dr Young said there was "no risk at all for anyone on that plane" because the woman was not showing symptoms during the flight.

Four families are in home quarantine in Brisbane after arriving from West Africa at different times.

There is a 21-day incubation period for Ebola, so for that entire period they are required to stay at home, take their temperature twice a day and report to authorities whether there is any increase in temperature - one of the initial signs of Ebola.

Federal Health Minister Peter Dutton said he was relieved for the woman and her family.

"This would bring to 12 the number of people who have been tested [in Australia] - all of whom have been negative - and we have in place the systems you would expect in the developed world," he said.

Ebola risk in Australia 'extraordinarily low'

Queensland Health is monitoring four families where members have recently been to Sierra Leone, Guinea and Liberia.

"We have to remember here in Australia the risk of getting Ebola virus disease is extraordinarily low," Dr Young said.

"We have good systems to pick up people who are unwell at the border, and then we have systems to support people out in the community.

"You do need direct contact with the secretions of someone who is sick ... whether that be vomit, faeces, urine or blood, to be able to contract the disease. That's very unlikely."

The development comes on the back of fears the deadly Ebola virus - which has infected more than 10,000 people in West Africa - could spread to Australia.

Earlier this month, nurse Sue-Ellen Kovack was discharged from Cairns Hospital after twice testing negative for the virus when she returned home from caring for patients in Sierra Leone.

Medical staff and their families on edge

Epidemiologist Dr Andrew Jeremijenko said the constant threat of Ebola was making some in the medical profession, including their families, very nervous.

"Yes they are, it is a killer virus and if I have to treat a patient with Ebola, there is a chance that if I don't take the right precautions I will get the virus and that's what all the doctors and nurses have to face," he said.

"There is no danger money for doctors and nurses and [they] just have to go and do their job and treat patients and there is fear."

He said Australians would have to get used to Ebola scares.

"We are going to see more and more cases of possible Ebola presenting at our hospitals and we won't know whether they are Ebola or not," he said.

"Our doctors and nurses will have to go to work every day thinking this could be the day doctors and nurses have had to treat an Ebola patient and have to wait anxiously for the result to know whether they have been exposed to the virus themselves."

The Australian Medical Association yesterday warned Australia's response to the crisis had been chaotic, with president Professor Brian Owler saying the Government was keeping Australians in the dark about its plans and medical professionals wanted a coherent strategy to tackle the crisis in West Africa.

At least 4,922 people have died - mainly in Guinea, Liberia and Sierra Leone - in the worst outbreak of the disease in history, according to the World Health Organisation.