South Australia

NSW recorded 78 new locally acquired cases of Covid-19 in the 24 hours to 8pm yesterday, with Premier Gladys Berejiklian saying 21 were infectious while in the community and eight were in isolation for part of their infectious period.

The isolation status of 12 cases remains under investigation.

Some 63,000 tests were done in the past day and they picked up cases in people who were not symptomatic, something the premier said was good news.

The state has detected 36 cases since infections were found in Adelaide on Sunday, the first community cases detected in six months.

Authorities say the "circuit breaker" measures were necessary to stop the virus' spread "at the beginning".

Australia has previously also responded aggressively to small outbreaks.

Various state governments have at times closed parts of the economy, enforced border restrictions and other measures to stop the virus' spread.