Last month a Canadian lady living in Australia Sue Ellen Kovack  set off to Sierra Leone to join the fight against Ebola. She returned to Australia on Tuesday.

However  there are fears the 57-year-old, from Cairns, is suffering from the illness she was helping to treat.

Ms Kovack is currently under observation for Ebola and has been quarantined at Cairns Hospital. 

She was hospitalized after she reported feeling a fever at 1pm AEST on Thursday.

Kovack is said to have joined the Red Cross for her volunteering in the West African nation.

But Ms Kovack's humanitarian efforts have been slammed by outspoken Federal MP Bob Katter. 

The member for Kennedy - whose electorate takes in the southern area of Cairns and the town's airport - said her volunteering pursuits had put the nation at risk. 

On Wednesday Ameria's first Ebola patient, Liberian man Thomas Duncan has passed away after battling the disease for ten day in a hospital.

The hospital released a statement which read, "It is with profound sadness and heartfelt disappointment that we must inform you of the death of Thomas Eric Duncan this morning at 7:51 am. Mr. Duncan succumbed to an insidious disease, Ebola. He fought courageously in this battle. Our professionals, the doctors and nurses in the unit, as well as the entire Texas Health Presbyterian Hospital Dallas community, are also grieving his passing. We have offered the family our support and condolences at this difficult time, hospital officials said."