Queensland Health believes that the nurse, who resides in North Brisbane, then transmitted the infection to her partner, who spread the infection to his social network.
Ms Palaszczuk said restaurants and cafes in the city can fully re-open as of 12pm on Thursday, but customers throughout Queensland must remain seated.
While the lockdown will lift today, a number of restrictions will remain in place for all of Queensland.
In broader measures, gatherings at homes across the state will remain capped at 30, dancing in public venues is banned and businesses must maintain distancing of one person per two square metres.
There are now 82 active cases in Queensland, with 35,357 COVID-19 tests conducted in the past 24-hours.More news: US Capitol On Lockdown After Vehicle Rams 2 Officials, Driver Dead
"What I say to the public is [that] this is very encouraging and we'll be providing you with an update again tomorrow at 9am and, fingered crossed, all will be looking good for Easter", she said.
'Well, I can thank Queenslanders because they have come out in their thousands to be tested'.
The change comes after Palaszczuk hinted yesterday that the state was on track to end the lockdown on-time if we continued to not see community transmission.
Queensland Health have meanwhile said Anzac Day events will go ahead in the state on April 25 as long as they are Covid-safe.
Queensland's chief health officer Jeannette Young fronted media on Good Friday, telling them there had been no community-acquired cases in the previous 24 hours.
"Which is what we know COVID does".More news: CDC Changes Tune on COVID Guidance for Vaccinated Travelers
The missing link is a nurse who worked at the Princess Alexandra Hospital.
Tuesday, March 23: Plus Fitness, Minyama from 7.30am-8.30am.
A "large number of staff" at the inner-city hospital will have to self-isolate, an internal hospital email said.
Anyone quarantining in the ACT due to having been in Greater Brisbane will receive communications from ACT Health advising them if they are able to leave quarantine, subject to them having received a negative COVID-19 result during their quarantine period.
The ward will also undergo a thorough deep clean.
The nurse didn't develop any coronavirus symptoms and was unaware she had been infected, and she was only tested as a close contact of another case.More news: US Capitol on lockdown over security threat
Another nurse who is part of the same cluster went to a hen's party in Byron Bay, northern New South Wales, where they infected six other people including guests and a male stripper.