The ACT has reported 24 new cases of COVID-19 to 8pm on Thursday, with most linked and more than half in quarantine throughout their infectious period.
Eighteen of the cases have been linked, while six are under investigation.
ACT Chief Minister Andrew Barr said there were 15 people in ACT hospitals with COVID-19 on Friday morning, including four people in intensive care.
One person required ventilation.
"Those high levels of linked and in quarantine are the good news out of today's headline number," Mr Barr said.
More than 50 per cent of Canberra residents aged 16 and above have received both doses of a COVID-19 vaccination, while 47.4 per cent of Canberrans aged 12 and up have received both doses of a vaccine.
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Mr Barr said the ACT was the first state or territory to reach the milestone.
The ACT will consider the impact of the NSW roadmap as part of plans to ease public health restrictions in the territory, but would not grant fully vaccinated residents freedoms before others.
NSW on Thursday announced it would allow fully vaccinated residents freedoms ahead of others as restrictions in the state eased.
Health authorities have again stressed the need to get tested for COVID-19 at the onset of even mild symptoms of the disease.
People who later tested positive for COVID-19 had waited days after becoming symptomatic before presenting to Canberra's emergency departments, prompting concern people were delaying getting a test.
Health Minister Rachel Stephen-Smith on Thursday said some of the people who had presented to hospital had been admitted for inpatient care.
"This is another reminder to please get tested as soon as you develop any symptoms of COVID-19, because we know with this disease you may in fact become quite unwell quite quickly," Ms Stephen-Smith said.
"This is a highly variable disease that can be mild or can be quite severe, and that can happen quite fast."
The ACT reported 15 new COVID-19 cases in the 24 hours to 8pm on Wednesday, including at least eight people who were in the community for part of their infectious period.
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