New South Wales reported 29,504 new cases of coronavirus overnight, down from 34,660 cases the previous day.
Seventeen people have died as hospitalisations and intensive care admissions continue to climb.
Just one of the 17 people who died with COVID-19 had received a booster shot, Chief Health Officer Dr Kerry Chant said.
One person was aged in their 60s, four were aged in their 70s, nine were in their 80s, and three were in their 90s.
“Can I just re-emphasise that you’re particularly at risk of severe disease from COVID if you’re over 65, or have underlying chronic conditions impacting the lung, heart, kidneys, liver,” Dr Chant said.
“If you have diabetes, or if you have conditions that impact your immune system – what we call immunocompromised – You are at risk of severe disease, and I can’t urge you more strongly – please come forward and get your booster.”
Dr Chant also warned that the COVID-19 death toll is likely to rise in the coming days due to the broad community transmission.
There are now 2776 people in hospital, including 203 in ICU, up from 191 yesterday.
Of the 29,504 new infections, 11,858 were rapid antigen test reports.
In Victoria there were 22,429 new COVID-19 cases and six deaths in the past 24 hours. Hospitalisations took another jump, with 1229 now admitted with COVID-19, up from 1114 yesterday. There are 38 people on ventilation, and 129 in intensive care.
Health Minister Brad Hazzard said the latest data from NSW Health showed that people who were not fully vaccinated were six times more likely to be hospitalised and 13 times more like to need intensive care, if they caught COVID-19.
“That means you are requiring the assistance of the health staff who are already exhausted,” he said.
“Can I just say to those people who have chosen not to get vaccinated – it’s time to give a damn about someone other than yourself.
“Give a damn about your community, your family, and most particularly, the health staff across NSW who you expect to be looking after you, if and when you end up in our hospital system.”
NSW Premier Dominic Perrottet has said 47 per cent of eligible residents have already received a booster shot.
“I want to thank everybody for the efforts they’ve made, particularly over the Christmas-New Years period,” he said.
He said from this week, state clinics would be able to administer about 270,000 vaccinations each week.