South Australia has recorded another three COVID-linked deaths and 3,143 new infections.
The number of cases in hospital has risen to 257 — up by 28 since yesterday — and includes 15 people in intensive care and two on ventilation.
The three people who died were all women — two of whom were aged in their 70s and another in her 80s.
Today's daily caseload is up on yesterday's figure, despite a slight drop in PCR testing.
There are 24,803 known active cases in South Australia, of a total of 413,321 since the start of the pandemic.
School resumed for thousands of students across the state today, following holidays.
All high school students and adults, including visitors, are still required to wear masks in school settings for another four weeks.
Australian Education Union state branch president Andrew Gohl said while there were "many views" on that subject, he understood the current policy.
"I think we're all sick of wearing them, of course," he said.
"But it's the necessary last defence to ensure a safe workplace and a safe learning environment for students."
Mr Gohl said he hoped there was no return to widespread online learning this term, given the extra demands such a step would place on teachers.
"Many would be very reluctant to go back to a hybrid model or even teaching online," he said.
"It requires significant extra work, it's a different mode of learning and it requires a different set of support materials."
The state government recently committed to purchasing an extra 1,000 air purifiers for classrooms — a measure welcomed by the union.
Meanwhile, it has been revealed another two South Australian Liberal MPs have contracted COVID-19.
Former health minister Stephen Wade and opposition health spokeswoman Ashton Hurn today revealed they had come down with the virus.
Opposition Leader David Speirs and deputy leader John Gardner tested positive last week and over the weekend.
