Annastacia Palaszczuk joins border wars by calling Covid variant menacing her state the 'Sydney strain' - as Queensland records one new case

• Victoria will be declared hotspot from 1am Saturday, QLD premier announced
• The new case is the mother of a 12-year-old boy who already tested positive 
• The family-of-three have all tested positive to the Indian Delta strain of the virus
• There are fears of an outbreak related to an infected Brisbane Airport worker 

Queensland has recorded one new locally acquired case of Covid-19 with Premier Annastacia Palaszczuk bizarrely referring to the virus variant as the 'Delta Sydney strain'.

The new infection is the mother of a 12-year-old boy that was listed as a confirmed case on Thursday. 

The premier revealed the cases had been detected while the family were quarantining at home after flying in from Sydney, adding there was 'zero' risk to the community.

She confirmed it was the highly infectious Indian Delta strain of the virus and all three members of the family, including the boy's father, have now tested positive. 

'This is exactly the type of news we wanted to hear today,' she said on Friday.

'This was the family that came out of hotel quarantine in Sydney and flew to Queensland and it has been confirmed that it is that Indian Delta strain, that Sydney strain that is circulating in Sydney at the moment.' 

Ms Palaszczuk meanwhile announced the whole state of Victoria would be declared a hotspot from 1am on Saturday. 

The borders will be slammed shut to Victoria and any returning Queenslanders will have to quarantine for 14 days upon arrival back in their home state.

'I just think that the clear message to Queenslanders is definitely do not go to New South Wales and do not go to Victoria during this period of time,' Ms Palaszczuk said.

The decision was made after Victoria was thrown into a five-day lockdown after a new outbreak emerged which has been linked to removalists from Sydney. 

There were six new infections recorded on Friday with the total number of active cases in the southern state now reaching 36.

Queensland health authorities confirmed the infected boy returned from the United States and completed a stint in hotel quarantine in Sydney with his mother before flying to Brisbane on Qantas flight 544 on last Friday, July 9. 

Chief Health Officer Jeannette Young said NSW authorities will now have to determine how the 12-year-old became infected during quarantine.

Dr Young says 62 contacts of that family have been identified. 

Meanwhile, there are fears of an outbreak related to a worker at Brisbane International Airport, who completed three night shifts on Monday, Tuesday and Wednesday, while she was infectious and was also very active in the community. 

The worker, who is fully vaccinated, was a supervisor at the boarding gates and has tested positive. 

So far 45 close and casual contacts of that airport worker have been identified, and they are being closely monitored and are isolating. 

Dr Young said Queensland is now dealing with two entirely new outbreaks that are not linked to the cases that sent southeast Queensland and Townsville into a snap three-day lockdown just over a fortnight ago.  

Ms Palaszczuk has told residents of the southeast that masks will help keep them out of what would be a fourth lockdown this year. Masks will be mandatory for another week, until Friday, July 23.

Queensland Health has listed new exposure sites linked to the latest three cases.

In the case of the airport worker they include the Brisbane International Airport, and the Woolworths and Chemist Warehouse at Annerley,

In the case of the boy and his father, the sites include Qantas flight 544 last Friday, the Aspley Medical Centre where the child was tested, and the father's workplace, Rowland Financial Advisory Service, at Cotton Tree on the Sunshine Coast. 

A limousine driver was fined $4,135 on Thursday after he was caught trying to enter Queensland from NSW with a false border declaration pass.

The driver and his passengers have been forced into hotel quarantine.