Australia has reached a full inoculation rate of 80 per cent of those aged 16 and older, which Prime Minister Scott Morrison called a "magnificent milestone" on the path to becoming one of the world's most vaccinated countries against Covid-19, Reuters reports.

Once a champion of a Covid-zero strategy to manage the pandemic, the country of 25 million has moved towards living with the virus through extensive vaccinations, as the Delta variant has proven too infectious to suppress.

"Another, magnificent milestone, Australia," Morrison said in a video post on Facebook. "That's four out of five, how good is that? This has been a true Australian national effort."