Premier Mark McGowan said while waiting for the results, the woman had been to a "range of places" including the WASO event and the Health Department was trying to track down those who sat near her at the Absolute Beethoven event as well as those on flight QF10. "We are now tracing all the places and events that she went to so we can publish that information and make sure people are informed if they were at those places or events, and they can take appropriate precautions," he said. A fourth WA person has contracted COVID-19. Credit:WA Health Department. "She is now self isolating at home and is being checked on regularly by the Department of Health." WASO advised in a statement released on Sunday afternoon that authorities said the situation was a "low risk" case but that every patron and staff member would be provided advice about what they should do if they develop symptoms.

WASO chief executive Mark Coughlan said he was "disappointed to receive this news" and his thoughts were with the woman and her family as they work through this "difficult time". "The safety of our staff, musicians and patrons is always our priority," he said. "We are taking immediate action in the best interest of our patrons and people." The Health Department updated its website with the latest confirmed case at 11am, without any public announcement and almost 24 hours after Premier Mark McGowan tweeted the 'WA COVID-19 UPDATE' which included the previously confirmed three cases. Health Minister Roger Cook said people needed to listen to the advice of their healthcare professionals, use common sense and above all do their best in the event that if they are positive they don’t spread the virus. "It’s really important for people to understand if you’re being tested for the coronavirus you need to exercise some common sense and precaution," he said.

"Even if you’re a low risk case, it’s important that we all take important steps to ensure that together we can get through this difficult issue." According to the Health Department, there was currently no local transmissions of COVID-19 in WA, meaning all cases had been imported. The fourth case of a WA person contracting the disease came as it was confirmed a 50-year-old Victorian woman tested positive to the virus after flying from Jakarta to Perth on February 27 before heading home to Melbourne. Mr McGowan said the government was working with the Victorian Health Department to find out exactly what the woman did while she was in Perth so they can provide people with the information in case they came in contact with her.

Loading Both women were diagnosed after James Kwan, 78, died from the illness at Sir Charles Gairdner Hospital last Sunday. He had been evacuated from Darwin to Perth on February 21 with his 79-year-old wife Theresa, who also tested positive to the virus and has since been sent home from hospital. The third recorded case in WA was a woman in her 30s who returned to Perth on Monday, having travelled in the UK and Iceland, coming home via Dubai, and became unwell on Tuesday. As of Sunday, 1,665 WA people had tested negative to the virus.