NSW has recorded 34,660 new Covid cases and 20 deaths on Sunday while Victoria has seen 28,128 new cases and 13 deaths.
About a third of new cases in each state were self-reported via rapid antigen tests - 10,000 in Victoria and 13,682 in NSW.
Sunday represents a large drop in cases in NSW - about 29 per cent compared to Saturday and the number of patients in ICU has also fallen to 191 from 193.
Authorities are hopeful the Omicron COVID-19 outbreak has peaked in several Australian jurisdictions, as the nation reaches a vaccination milestone.
NSW Covid cases have dropped by 29 per cent on Sunday compared to the Saturday (pictured: Sydneysiders in Darling Harbour on Saturday)
Health Minister Greg Hunt on Saturday has declared the nation has reached a 95 per cent first-dose vaccination rate against the virus for those aged 16 and older.
He said the milestone surpassed 'almost all possible predictions that were made at the outset of the pandemic'.
'That is often referred to as a full vaccination level but we want to go further, we want to continue to encourage Australians to come forward,' Mr Hunt told reporters.
More than a million vaccines have been delivered in the past three days, which is a record for any immunisation program in Australia's history, he said.
Some 92.5 per cent of Australians aged 16 and older have had two vaccine doses, while 52.6 per cent have received their booster, including more than 245,000 people on Friday.
More than 250,000 children aged between five and 11 have received their first dose of a vaccine since becoming eligible on Monday, including 57,000 on Friday.
Mr Hunt also flagged a decision on the Novavax COVID-19 vaccine - which is not yet available in Australia - is expected by the Therapeutic Goods Administration 'in the coming 10 days'.
About 51 million doses of the protein-based vaccine have been ordered by the federal government.
An announcement on oral treatments for COVID-19 is also imminent, Chief Medical Officer Paul Kelly said, while the federal advisory panel on vaccines has begun deliberating on the possibility of a second booster shot.
Health Minister Greg Hunt announce the country has reached the 95 per cent milestone for first vaccine doses for Australians aged 16 (pictured on Saturday)
Mr Hunt and Professor Kelly said there were 'signs of hope' the outbreaks in the ACT, NSW and Victoria have peaked.
'All predictions, and now the actual forecasting based on actual numbers of
