Queensland has recorded eight new cases of coronavirus.
Seven of the confirmed infections announced on Friday were in hotel quarantine, Queensland Premier Annastacia Palaszczuk said during a presser.
The other is a historical case deemed to be the missing link from the first Covid-19 cluster in Brisbane.
She is a nurse who became infected with Covid after treating a "superspreader" who arrived from Europe last month.
The man also transferred Covid to a doctor, Queensland Chief Health Officer Jeannette Young said.
"We managed to pick her (the nurse) up through being a contact... and we have done the testing and that's come back positive," Dr Young said.
The nurse, who didn't have any symptoms and was not yet vaccinated, then unknowingly gave it to her partner and it spread "throughout their network".
"So it's clear that's how she got it and she transmitted it to her partner and it moved into that circle of friends and colleagues," Dr Young said.
"Which is what we know COVID does."
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Dr Young said finding the "missing link" was an "enormous relief".
"When you don't know the links, when you know there's still something out there," she said.
"I'm just never sure what else could be going on, what other chains of transmission, what other friendship groups could there be, what other venues."
A list of venues visited by the nurse while she was infectious from March 10 to March 23 will be released later on Friday.
Ms Palaszczuk said it was "fantastic news" there had been no new local transmission.
She also praised the public after 35,357 tests were conducted in the past 24 hours.
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