Workers in high-risk settings such as hospitals and aged care have been advised not to attend work if they have recently travelled to some parts of Queensland.
The advice came as the ACT reported another day without a new coronavirus infection.
Eight Queensland local government areas have been identified as having a risk of community transmission.
ACT Health urged anyone who had recently returned from one of these locations not to go to their workplace for 14-days after leaving the area.
They are: Brisbane City, Ipswich City, Logan City, Scenic Rim Region, Somerset Region, Lockyer Valley Region, Moreton Bay Region, and, Redland City.
"The advice extends to all staff, volunteers and visitors in high-risk settings, specifically hospitals, residential aged care facilities, correctional facilities and residential accommodation facilities that support people who require frequent, close personal care and who are vulnerable to severe disease," ACT Health said in a statement.
The same advice was introduced two weeks ago for people returning from greater Sydney.
"These workers, volunteers and visitors are asked to be alert for COVID-19 symptoms such as a fever and dry cough, and if symptoms develop, to immediately self-isolate at home and arrange to get tested," ACT Health said.
General practitioners and other community health practitioners can continue to work, but should be vigilant and get tested if they are mildly symptomatic.
The ACT has reported 46 days since a COVID-19 case was diagnosed. There have been 113 cases in the territory, 110 people have recovered and three people have died.
ACT Health said 71,393 negative tests had been returned to date.
