If the coronavirus, or the next big one is any guide, Australia due to its globalism and deracination, will simply be open to wide contamination. Maybe a good plague might wake up those who survive, but I doubt it:
https://www.dailymail.co.uk/news/article-7950429/Where-Australians-risk-exposed-deadly-coronavirus-disease-spreads.html?ico=pushly-notifcation-small
“Australia's gateways, major tourist destinations, universities and suburbs in Sydney and Melbourne with large numbers of Chinese have emerged as the frontline in the fight against deadly coronavirus. Authorities are closely watching key meeting places around the country for signs of outbreaks as the World Health Organisation declares a global public health emergency. Fears are held thousands of Australians could have been unwittingly exposed to the virus in airplanes, restaurants and shopping centres by nine confirmed infected patients. And every week up to 49,000 people are landing in Australia on 167 flights from China, where 170 are dead and more than 7,700 infected. Many of those arriving are heading to holidays spots such as the Gold Coast, visiting family and friends in suburban Sydney and Melbourne or returning to east coast universities. But first they must come through the international airports, where checks have already been rolled out for those arriving from all Chinese cities.
