Queensland is closely monitoring COVID outbreaks in NSW and Victoria after further cases of community transmission south of the border.
The Sunshine State recorded three new cases on Thursday, all of which were acquired overseas and detected in hotel quarantine.
Roads Minister Mark Bailey said he was concerned about the recent cases in Melbourne and Chief Health Officer Jeanette Young was monitoring the situation closely.
"Queensland has never been slow to act when it comes to the threat of this virus. That's our approach. That will continue to be our approach and we're monitoring both those states closely," he said
Another three locally acquired coronavirus cases have been identified in Victoria, in addition to three women whose positive tests ended a two-month streak without infections on Wednesday.
NSW reported 10 new cases of community transmission, with five linked to Sydney's northern beaches cluster.
The Queensland border is closed to anyone who has been in the COVID declared hotspots of Greater Sydney and surrounding areas in the past 14 days.
Border declaration passes are also needed for travellers who have been in NSW since December 11.
Mr Bailey said Queensland's approach to stopping the virus had been "world leading".
"One of the key reasons we've done that is because we've taken health advice from day one, and we'll keep doing that to keep Queenslanders safe" he said.
A woman who recorded Australia's first known case of the South African variant of the virus was asymptomatic and reportedly feeling well, Queensland Health said.
She is in isolation at Sunshine Coast University Hospital after landing in Brisbane carrying the 501.V2 South African strain on December 22.
Standard COVID-19 precautions were being taken, including appropriate infection control procedures to protect treating clinicians.
