South Australia has recorded one new local COVID-19 case in its current cluster, linked to a winery in Adelaide’s north.
The man in his 60s initially tested negative but returned a positive result after developing symptoms while in quarantine, authorities said on Friday.
The new case comes from a record 23,572 tests, and takes the current outbreak to 15 confirmed infections. Eight are linked to Tenafeate Creek Wines in Yattalunga.
Premier Steven Marshall said he is hopeful the state's lockdown could be scaled back at the end of the seven days, as planned.
“All the early signs are very positive that this will only be a seven-day lockdown,” he said.
“Of course, after those seven days there will be a step down. We won’t be going back to having no restrictions in South Australia.
“The early signs are very good but this is the Delta variant and we have to be very careful.”
South Australia's chief health officer Nicola Spurrier said all but one of the contacts from the two high-risk locations - the winery and CBD restaurant The Greek - had now been contacted.
“So it [the winery] really is a super spreading site or a super spreading event that happened there on that afternoon,” she said.
About 100 people linked to the two events were on Thursday moved to medi-hotels following a risk assessment, Professor Spurrier said.
“If we feel there is any risk whatsoever to the public, also to the wellbeing of the individuals, then the decision is made that we would transfer them to a medi-hotel,” she said.
“It is safer not only for them, in terms of giving them the medical support, it is also safer for the community.”
In response to reports people were still having to wait up to 14 hours for a COVID-19 test, a booking system will be trialled at two sites over the weekend.
The first of 40 Australian Defence Force staff have been deployed to help with swabbing and other duties. ADF staff will also stand up a testing facility on a military base.