South Australia coronavirus cluster grows again as pizza bar link confirmed

South Australia has recorded two new coronavirus cases in the past 24 hours and both are believed to be linked to the Parafield cluster.

A man in his 40s has returned a positive test, and authorities have said he is a close contact of someone who is linked to the cluster.

His case takes the total number of cases in the cluster to 31.

"This person was in quarantine and was quarantining with his family," Chief Public Health Officer Nicola Spurrier said.

"So we feel quite confident that because of the circuit breaker in that period of time and because our contact tracing team had been able to get hold of the people involved with this part of that cluster, we don't have a risk of that going any further forward."

The other case was announced last night — a teenage girl who attends Woodville High School.

Dr Spurrier said the year 11 student had been linked from an "epidemiological point of view" through contact with the Woodville Pizza Bar.

Genomic testing had still not been completed, she said.

"It looks as though she has had an exposure at the Woodville Pizza Bar, having picked up a pizza on November 14, which indeed was an infectious period and we knew there were people that were there that were infected," Dr Spurrier said.

The school has been closed today and anyone who attended on Monday, November 23, has been ordered to isolate immediately with their families.

More pizza bar contacts missing

Dr Spurrier said everyone associated with the school on that date had been contacted, but there may be some people connected with the pizza bar who had still not come forward.

"The important thing is if you did get a pizza from that pizza bar and you haven't been tested, now is the time to do so," she said.

While Premier Steven Marshall last week blasted a pizza bar worker for allegedly lying about working at the shop, Dr Spurrier would not lay the blame on the girl for going to school when she had had some contact with the pizza bar.

"The fact that she did get tested, I am so pleased about," she said.

There are now 31 cases linked to the cluster.

One woman remains in hospital but she is in a stable condition.

About 4,800 people linked with the cluster are now in quarantine.

Nearly 10,000 people were tested in South Australia yesterday, and a new air-conditioned Adelaide Showground testing site will open on Friday, when hot weather is predicted.

About 95 per cent of staff at the Peppers Waymouth Hotel, where two new cases were detected yesterday have been tested and cleared of coronavirus.

QR code app launched

The Premier also announced this afternoon an official app to be used by people to check in to businesses using QR codes.

The South Australian Government's MySA GOV app will have a feature added to it for people to scan QR codes, which are similar to barcodes, to help with contact tracing.

Mr Marshall said it would help open the economy and support jobs from its start date of next Tuesday, December 1.

Paper forms will be available as a back-up and for people without smartphones.

Dr Spurrier said she visited Rundle Mall earlier today and noticed "some people" wearing face masks.

She urged more people to don them, especially as crowds grew in the lead-up to Christmas.

"We really do want to encourage people to wear masks because it's going to be crowded and you will potentially be in close contact with a large number of people from all over South Australia," she said.