Here's a look at what's happening in the state of Victoria, where 191 new infections have been recorded over the past 24 hours.
Five million people in and around Melbourne - the country's second biggest city - have been ordered back into lockdown for the next six weeks.
They will be restricted to their homes and can only leave for essential reasons, such as for work and for exercise. Schools will largely return to distance learning and restaurants will, once again, only be permitted to serve takeaway food.
The measures will come into force from Wednesday.