"It could be quite a variable rollout depending on where you are," the Regional Health Minister said.
"This is not people travelling from Sydney to Brisbane, it's people who live 15km from their mailbox and 120km from town."
As Australians wait for access to the COVID-19 vaccine, the peak body representing pharmaceutical companies says funding for research is vital.
Four new locally acquired cases of COVID-19 were found in NSW in the 24 hours to 8pm tonight, with a further four found in hotel quarantine.
A man tested positive when his ship docked in Darwin, while his crewmates have been whisked into a quarantine facility.