Queensland has recorded one new case of COVID-19 in a Russell Island woman in her 60s who may have taken the local ferry on multiple occasions while infectious.
The new coronavirus case recorded on Saturday was a contact of a known case linked to the Brisbane youth detention centre cluster, Health Minister Steven Miles said.
Mr Miles said the woman commuted on the southern Moreton Bay islands ferry service while infectious for up to four days, and passengers should watch out for respiratory symptoms.
A pop-up testing site would be established on Russell Island.
"That is a concern for our health authorities, we have been concerned throughout the pandemic about the southern Moreton Bay islands, people are on those islands - they are vulnerable, often have difficulty accessing health services," Mr Miles told reporters.
"Please monitor your health very, very closely."
Mr Miles said the island would not yet be shut off to travellers.
It comes after Queensland Premier Annastacia Palaszczuk on Friday said her state would not tolerate AFL players breaking health restrictions following the arrest of Richmond players Sydney Stack and Callum Coleman-Jones over a Surfers Paradise brawl.
The pair were meant to be at their team's hub and have since been fined by the AFL for breaching COVID-19 protocols and sent home to Victoria.
"AFL players caught breaking COVID rules should be sent home," Ms Palaszczuk tweeted on Friday, before the AFL announced its decision on the Tigers players.
Mr Miles on Saturday said the behaviour of Stack and Coleman-Jones was "pretty inappropriate" and supported the decision to send them home.
"Our sporting stars, they are leaders of our community, young people look up to them ... it's good to see they've been sent home, the AFL have acted pretty strongly," Mr Miles said.
"They've let down their teams, their communities, their families."
Mr Miles also defended the decision to allow AFL executives to quarantine at a luxury resort after giving Brisbane's Gabba the hosting rights for the sport's grand final.
About 400 AFL staff have booked out the entire RACV Royal Pines Resort Gold Coast, where they are reportedly able to play golf and "mingle in the pool".
Both Ms Palaszczuk and Mr Miles said other states would have offered the same guidelines to AFL staff if they'd obtained the grand final hosting rights.
Most people quarantining in Queensland are forbidden from leaving their hotel rooms.
Mr Miles insisted the AFL staff were acting in accordance with a COVID-safe plan and avoiding the transmission of COVID-19 in Queensland was the sole priority.
Meanwhile, Queensland Health issued on Friday a health alert for those who visited Fantastic Furniture and Spotlight in West Ipswich and Johnny Furniture in Booval on the morning of August 29. They are considered casual contacts of a COVID-19 case.
There are currently 26 active cases of COVID-19 in Queensland.