A South Australian nurse who worked on the front line of Victoria's coronavirus crisis has been diagnosed with COVID-19 after returning to Adelaide.
The middle-aged woman had been working to assist with the outbreaks in Victorian aged care facilities.
SA Chief Public Health Officer Nicola Spurrier said the woman had no symptoms.
"It really just shows that even with our very, very most experienced nursing staff and wearing all of the PPE [personal protective equipment] required, that this is a very transmissible virus," Dr Spurrier said.
She said eight nurses who travelled back to Adelaide with the woman were considered "close contacts".
However Dr Spurrier said each of them wore masks and PPE at all times, including on the flight back to Adelaide, and they had been quarantining in one of the city's medi-hotels.
There are now three known active cases in South Australia.
Queensland travellers urged to get tested
SA Health has reiterated advice for anyone travelling from Queensland to be extra vigilant about coronavirus, given the open borders between the two states.
"We do have open borders with Queensland and there are quite a significant number of South Australians coming back from Queensland every day," Dr Spurrier said.
"It's quite a complex and unfolding situation.
"Please get tested if you have been in the Greater Brisbane or Ipswich areas."
Dr Spurrier said SA Health was considering introducing quarantine measures for travellers from Queensland.
She urged any aged or disability care professionals returning to Adelaide from Queensland to self-isolate for 14 days and get a negative test before returning to work in SA.
Queensland health authorities today released an extensive list of venues that people from a youth detention centre in Brisbane's west, who had tested positive to COVID-19, had visited.
The list includes supermarkets, restaurants, a swimming pool and several retail outlets, including Bunnings and Ikea.
SA Premier Steven Marshall recently visited Queensland, but a Government spokesperson said he did not visit any of the locations on the list and he tested negative for COVID-19 upon his return to Adelaide.
