Another eight coronavirus cases have emerged in Queensland, with the current outbreak growing to 15 persons.
Premier Annastacia Palszczuk says six of the new cases are believed to be linked to existing infections, while another two are still under investigation.
There are now two distinct clusters of the UK variant of COVID-19 in Greater Brisbane.
Both clusters are linked to frontline healthcare workers who worked at the Princess Alexandra Hospital but had not yet been vaccinated.
“We now believe that there are two distinct clusters so we have a cluster linked of course to that PA doctor and we have a second cluster linked to the PA nurse,” Ms Palaszczuk told reporters.
A COVID-19 outbreak sent about 2.5 million people in Greater Brisbane into a snap three-day lockdown on Monday afternoon.
Hundreds more people around the state who have visited Brisbane since March 20 are also under orders to stay at home and self-isolate.