No new coronavirus cases have been recorded in South Australia after an outbreak in the community prompted a testing blitz.
SA reported five new local cases on Wednesday involving a miner who recently returned from the Northern Territory, his wife and three of their children, all aged under 10.
A further 28 miners who returned from the same site last week have been retested and again produced negative results.
No new cases were detected from 11,700 tests on Wednesday after Premier Steven Marshall opted not to plunge the state into lockdown.
"It's a huge relief for every single person in this state," the premier told reporters on Thursday.
"We're very pleased with the way things are going at the moment."
Chief Public Health Officer Nicola Spurrier said the miner had been "quite unwell" and received treatment at Royal Adelaide Hospital but had since returned to his medi-hotel.
The family was in isolation since the man's return, giving authorities some confidence there will be no further community transmission.
Test results are continuing to trickle in for 121 passengers who were on the same flight as the miner. Two passengers are yet to be contacted.
At least 300 people will be ordered to quarantine after being at Adelaide Airport during the exposure period.
Others being tested include family members of the miners, workers at a fast food outlet and those who delivered supplies to the family during their quarantine period.
Restrictions on gatherings and venue limits will remain until at least midnight on Monday and potentially longer depending on developments in other states.
"We are very satisfied with the cooperation that we've had from the miner and his family with all of those people that have been asked to go into quarantine," Mr Marshall said.
"Let's just hope that we continue to have some zero days going forward."
From next week, 12,000 doses will be administered per week at the Wayville mass vaccination hub.
Regional vaccination hubs are also set to open later this month in Victor Harbor, Mt Barker and Gawler.