One of Australia's largest shopping centres and a swim school in the suburb of Bundoora have been listed as Tier 1 exposure sites for COVID-19, as further positive cases have been reported in the Victorian capital.
Following this morning's news of two likely coronavirus-positive cases in Melbourne's north, tests of family members - one adult woman and a child - have also come back positive, taking the number of new locally-acquired cases to four.
The epicentre of locations has moved slightly south from Epping where the majority of previous venues were concentrated, with a case having Highpoint Shopping Centre in Maribyrnong on 20 May from 5pm to 8pm, as well as 'Jump! Swim Schools' at Bundoora on 21 May between 8:55am and 10:15am.
Both locations have been given a Tier 1 designation but with different conditions attached.
Anyone who visited the swim school at the stated times must get tested immediately and quarantine for 14 days from exposure.
Those who visited the shopping centre must also get tested, however they have been directed to isolate until further notice rather than going into quarantine.
"I can advise that one of the individuals lives within the wastewater catchment areas that produced the strong detection that we reported last Friday," Victorian Health Minister Martin Foley said.
"There is as yet no indication that these individuals are linked to any exposure sites from the previous alert case, but investigations are ongoing.
"I do indicate there are likely to be more sites as further investigations continue."
In response to the evolving situation, NSW Health has issued a health alert for Melbourne, urging people who have attended the listed exposure sites at the stated times to contact the agency immediately on 1800 943 553
People arriving in NSW from the Greater Melbourne area are reminded that they must complete a declaration confirming they have not attended one of these venues of concern.
"Declaration forms can be completed within the 24-hour period prior to entering NSW, or on entry to NSW," NSW Health said.
"People who have been in the Whittlesea Local Government Area should not visit residential aged care facilities, or hospitals unless seeking medical attention.
"The Whittlesea LGA includes the suburbs and rural localities of Beveridge, Donnybrook, Doreen, Eden Park, Epping, Humevale, Kinglake West, Lalor, Mernda, Mill Park, South Morang, Thomastown, Whittlesea, Wollert, Woodstock and Yan Yean."
The Queensland Government has declared anyone already in the state or arriving before 1am on 26 May, who has been at the Melbourne Tier 1 exposure sites at the stated times, must quarantine at their home or other suitable accommodation until 14 days have passed since their exposure.
Anyone who has been to the relevant sites and the listed times and arrives in Queensland after 1am on 26 May, will need to enter Queensland Government-arranged quarantine accommodation.
Meanwhile in Tasmania, any recent arrivals into the state from Victoria who have been at any of the listed exposure sites must immediately self-isolate and contact the Public Health Hotline on 1800 671 738 to organise testing.
Further, anyone who has been to any of the locations of concern will not be permitted to enter Tasmania unless approved as an essential traveller.
Updated at 4:48pm AEST on 24 May 2021.
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