Victoria's borders closed at 11.59pm Friday to anyone who has been in Brisbane City, Moreton Bay, Redland, Ipswich and Logan on or after Saturday January 2.
Covid testing underway on the first full day of Brisbane's three-day lockdown after a cleaner tested positive to the UK Covid-19 strain.
Ms Palaszczuk said she had declared Greater Brisbane a hotspot ahead of Friday's National Cabinet meeting.
More than 19,000 tests were conducted in the state over the past 24 hours and Premier Annastacia Palaszczuk thanked Queenslanders for complying with lockdown measures including the mandatory use of masks in public.
Those who test positive for the United Kingdom strain of the virus will now complete a full 14 days in hotel quarantine, even if symptom-free and no longer infectious.
The state recorded no new cases of community transmission yesterday, But health officials are working to track down passengers who were on the same Jetstar flight from Melbourne to Brisbane as the latest confirmed case in Queensland.
Greater Brisbane remains in lockdown, which started 6pm Friday and is scheduled to end Monday 6pm although the Premier has made not ruled out extending the lockdown.
The Public Health Unit confirmed anyone who attended these venues at these times was now considered to be a close contact with a Brisbane quarantine hotel cleaner who tested positive to the United Kingdom variant.
Additionally, the state has introduced a mask mandate for the Greater Brisbane area, so basically, if you need to leave the house for one of the four essential reasons listed above, you *must* wear a mask.
"This is very, very, very low risk, but it's not zero risk, so we're just taking all of those precautions". They will be quarantined for 14 days and tested further, but Dr Young said she was still concerned about casual contacts in places the woman visited prior to testing positive.
Nearly 100 people have arrived in Victoria from Greater Brisbane on Saturday, despite being told to stay put during that region's lockdown.
The government spokeswoman said 50 per cent of Saturday's volume in Victorian virus-testing sites had come from travellers from Queensland.
"We've taken their details and they're in home quarantine until Monday night", a government spokeswoman said. She was tested in hotel quarantine on the 27th and her results came back positive.
"Evidence shows that this variant is 70 percent more infectious than other strains".
Queensland Health Minister Yvette D'Ath said the woman had followed the protocols in Victoria which weren't as strict then as they are now. "This is not dissimilar to what has happened in other jurisdiction", she added. "If you want to do a bit of exercise, please put your mask on, and you can go and do a walk around your neighbourhood", she said.
Restaurants and cafes remain open for takeaway only.
Residents of Algester, Sunnybank Hills and Calamvale who have symptoms of the infection are especially urged to get tested as soon as possible.