Western Australia on high alert after FIFO worker tests positive after returning to Perth - sending hundreds into isolation and threatening another lockdown By Charlie Coë For Daily Mail Australia Published: 07:15 BST, 4 August 2021 | Updated: 07:33 BST, 4 August 2021 4 Viewcomments A fly-in fly-out worker has tested positive to Covid-19 in Perth after flying into the city's airport - as hundreds of travellers are ordered to self-isolate. Western Australia Premier Mark McGowan said the worker tested positive to the virus after returning from the Fortescue Cloudbreak mine site in the state's north-west on July 27. He is believed to have caught the virus at Perth Airport on July 20 from a traveller who flew to WA after completing hotel quarantine in Queensland. The worker returned a 'weak' positive result and authorities are unsure when, or for how long, he was infectious in the community. 'To further complicate matters, the FIFO worker had been COVID-positive back in March and April last year,' Mr McGowan said. Western Australia Premier Mark McGowan has announced a fly-in, fly-out worker has returned a 'weak' positive result after 'There is some confusion, we don't know if he is actually a shedder of the virus now, although that is unlikely. 'We don't actually know that he acquired it from the gentleman at the airport on July 20, but that is the most plausible explanation we have.' He is believed to have spent most of his time in the coastal suburb of Fremantle and Greenwood in Perth's north since returning from a week-long stint at the mine site. Anyone who was at either terminal three or four at Perth Airport on July 20 between 4.15am and 6am has been told to get tested and isolate until they receive a negative result. The premier said health officials would publish a list of exposure venues the positive case had been to as soon as possible. More to come Share or comment on this article: All rights reserved for this news site (dailymail) and under his responsibility