Young children in Tasmania have been guaranteed a flu shot by the state's health department despite a national shortage.
A surge in demand for the vaccine of up to 30 per cent has led to a limited supply across Australia, federal authorities said earlier this week.
Tasmania's director of public health Mark Veitch says vaccines have been put aside for kids aged up to six.
"Anyone wanting to have their child aged from six months to five years vaccinated under the state government's free vaccination program should take their children to their GP as soon as possible," he said in a statement on Thursday.
"We have taken measures to ensure there is flu vaccine available for these children."
Dr Veitch said the state health department is working with the Commonwealth, which is attempting to get extra vaccines.
Around 140,000 people from high-risk groups have received the flu shot this year in Tasmania, a rise of more than 25 per cent from 2017.
High-risk groups include those aged over 65, pregnant women and Aboriginal and Torres Strait Island people.
"People not eligible for a free flu vaccine may experience difficulties in obtaining privately-purchased vaccines," Dr Veitch added.
