The ACT has crossed the 90 per cent COVID-19 vaccination threshold, extending its lead as the most vaccinated jurisdiction in Australia.
The territory has the highest rate of full and partial vaccination among the eligible population - those aged 12 and over - of any state and territory.
The ACT reached the 80 per cent vaccination threshold on Monday, October 18, but health authorities are still working to reach pockets of the ACT where vaccination rates are lower, including inner-north Canberra.
NSW is close behind, with 85.5 per cent of the 16 and over population fully vaccinated, data released by the federal Health Department on Tuesday showed.
The ACT government will make changes to its test, trace, isolate and quarantine rules on Wednesday, when health authorities provide an update on the outbreak.
Relaxed rules have already seen movement across Canberra dramatically increase, with the number of venue check-ins up by nearly 50 per cent this past weekend compared to the first weekend out of lockdown.
There were fewer than 920,000 check-ins using the Check-In CBR app across October 16 and 17, but there were 1.37 million check-ins the following weekend, after non-essential retail reopened.
No significant changes to restrictions are expected to be announced on Wednesday, as another tranche of rules were already set to be relaxed on Friday under the ACT's reopening plan.
The ACT has posted three days in a row of low COVID-19 case numbers, amid concerns low testing rates have not identified all the cases in the community.
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Meanwhile, the Therapeutic Goods Administration has provisionally approved a booster dose of the Pfizer vaccination for people aged 18 and over, for administration six months after their second dose.
The approval will be considered by the Australian Technical Advisory Group on Immunisation, which will provide advice to governments on the booster shot program.
ACT Chief Minister Andrew Barr has previously said work was well underway in the territory to run a booster shot program.
ACT government clinics, including the AIS mass vaccination clinic, are already offering third doses of COVID-19 vaccination for eligible immunocompromised people but these are not regarded as "booster" shots.
Eligible people will require a letter from the treating physician as evidence when they attend.
Health Minister Rachel Stephen-Smith said the rollout would make it "easier for at-risk Canberrans to get protected faster".
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