Queensland has recorded no new cases of community transmission of COVID-19 after a doctor became infected in Brisbane.
She tested positive on Friday after spending time working at Princess Alexandra Hospital and four other venues in the city's south side on Thursday.
The state government has tested about 230 of the 400 people who may have come into contact with the doctor, but all have come back negative.
"That's great news and we're feeling a little bit relieved today," Premier Annastacia Palaszczuk told reporters on Tuesday.
As a precaution, the government has extended a lockdown of all Brisbane hospitals, aged care facilities and disability providers for another 72 hours.
Guests quarantining at the Hotel Grand Chancellor will find out out on Wednesday whether their quarantine will be extended again.
Two guests staying in separate rooms on level one of the quarantine hotel became infected there last week.
One of those guests passed the virus onto the other guest, despite having no apparent physical contact, and later the doctor.
Deputy Chief Health Officer Sonya Barrett said CCTV analysis shows there's no evidence of any significant breach at the hotel.
She said that could indicate that the first guest is a "superspreader" and a lot more contagious than typical patients.
"This is a highly infectious virus, particularly in some people," Dr Barrett said.
"You've heard the term 'superspreaders' and I think what we mean when we say that is that some people very readily transmit the virus, due to, due to a number of factors, not just anyone."
As a result guests who have been staying on level one of the Grand Chancellor will have their quarantine extended for 14 days from March 9.
All staff who worked at the hotel between March 5-9 were tested on Monday.
Every guest who left the hotel since March 1 has also been contacted and ordered to isolate and get tested.
Health Minister Yvette D'Ath said as of Tuesday morning 21,861 people have had their first vaccine dose.
The state's first vaccine hub on the Gold Coast, and hubs in the Torres Strait, have already started to give people in group 1b their initial jabs.
She says Queensland will have vaccinated every person in group 1a by March 30.
The minister confirmed reports that hospital workers like kitchen staff, who do not deal directly with COVID-19 patients, were already getting vaccinated.
Ms D'Ath said the Pfizer vaccine is highly perishable and can't be stored after being defrosted, so Queensland Health has been giving doses to other workers if frontline workers aren't immediately unavailable.
"No one in 1a is missing out or having their booking cancelled to give it to someone else," she told reporters.
"They're all arriving, they're getting vaccinated, but we are having some excess at the end of the day that we're making sure we don't throw it in the bin.
"Every state and territory is doing this and the Commonwealth is doing this in aged care as well."
