Queensland has recorded three new locally-acquired COVID-19 cases linked to the cluster in Brisbane's west, in positive news for residents locked down in the far north.
Premier Annastacia Palaszczuk said each of the new cases had been in quarantine for their entire infectious period.
It's encouraging news for Cairns, with no confirmed spread from a taxi driver linked to an earlier Delta variant case involving a local marine pilot.
More than 4,200 tests were recorded in the city in the past 24 hours.
"It's very encouraging to see Cairns residents coming out and getting tested," Ms Palasczuk said on Tuesday.
The taxi driver wasn't identified as a close contact until well after he drove the marine pilot to the Cairns airport.
The unvaccinated driver was infectious in the community for a total of 10 days, seven of them spent driving passengers around Cairns.
Since the driver tested positive on the weekend, contact tracers have been working overtime to ensure all his contacts are isolating.
Residents of Cairns and the Aboriginal community of Yarrabah are currently subject to a three-day lockdown, which is due to end at 4pm on Wednesday if there's no sign of further infections.
At the opposite end of the state, authorities are on alert for a possible link between Queensland and an infected man who has sent communities in northern NSW into lockdown.
The Byron Shire, Richmond Valley, Lismore and Ballina Shire local government areas went into a snap lockdown at 6pm on Monday after a positive case from Sydney travelled to Byron Bay.
Queensland authorities were told about the case on Monday amid reports the man had also been to the Gold Coast.
Samples have been sent to Queensland for genomic sequencing that should reveal if his infection is linked to any cases north of the border.
Regardless of where the man became infected, NSW has reassured Queensland he was not in the state at any point during his infectious period.
"We continue to monitor the situation in NSW every day. If there is a need for tighter border controls, we will implement them," Queensland Health said in a statement late on Monday.
