New Zealanders have already popped the one way trans-Tasman bubble and it's only been four days.
Under current rules travellers from New Zealand can fly to New South Wales and the Northern Territories without self isolating.
But they haven't stopped there, turning up in Melbourne, Adelaide and even Tasmania - where borders remain closed.
Heather Worth is an Associate Professor of Public Health and Community Medicine at the University of New South Wales.
She speaks to Corin Dann.