Australia has recorded 16 new COVID-19-related deaths, including seven in NSW and four in Victoria.
Three further fatalities were reported in Queensland on Sunday, while South Australia and Western Australia each announced one death.
NSW has reported 13,093 new COVID-19 infections along with a further seven deaths.
The state's caseload continues to fluctuate. Numbers were below 10,000 at the beginning of last week and peaked at more than 16,000 on Thursday, while Saturday's total was 12,850.
Health officials said the majority of fresh infections are among the young, aged between 10 and 19.
Meanwhile, the number of patients in hospital is steady at 965, with 44 in intensive care.
Of the latest infections, 7,867 were detected using rapid antigen kits and 5,226 were returned via PCR lab tests.
The state's booster vaccination coverage is still short of the levels authorities had hoped for.
Some 57 per cent of eligible adults have received a third dose, while 95.9 per cent per cent of those 16 and over have had one vaccine shot and 94.4 per cent two.
A further four COVID-19 deaths and 5,192 new cases have been reported in Victoria, as a mandatory vaccination deadline passes in the state.
The cases include 3,434 from rapid antigen tests and 1,758 from PCR lab tests, the health department confirmed on Sunday.
The number of Victorians in hospital has grown by 20 to 195 patients. This includes 25 people in intensive care with eight on ventilation.
There are 40,606 active cases in the state.
Victoria has 62.5 per cent of adults vaccinated with three doses, as mandatory jab rules come into effect for key workers.
After being pushed back, the new deadline has passed for aged care, disability, emergency service, meat processing, quarantine and food distribution workers to get their third jab by 11.59pm on Saturday.
It means these workers, including contractors, volunteers and students on placement, must have received a third dose to attend work or hold a valid exemption.
Healthcare workers who received their first jab before 12 September are also now required to have their third dose.
Meanwhile, Tasmania and the ACT posted 932 and 649 new infections respectively.
Another three people have also died in Queensland, as the Sunshine State added 3,669 new cases.
South Australia announced 2,023 infections and one death, while there were 151 cases in the Northern Territory .
Western Australia reported its 13th death on Sunday, a woman in her 80s, on top of another 3,602 cases.
It comes as the nation's governments want to wind back isolation requirements and reduce the reliance on PCR testing.
The Australian Health Protection Principal Committee is urgently reviewing both changes following the decisions made at last Friday's national cabinet meeting.
