Sydney's Bondi coronavirus cluster has had its biggest daily surge in cases — but NSW Premier Gladys Berejiklian warned worse may be hours away.
Millions in Greater Sydney are now under the strictest lockdown in the country as it's feared the outbreak that grew by 30 cases on Sunday has not yet reached its peak.
Dozens of new hotspot locations are being revealed every few hours by contact tracers racing to identify the highest risk locations across the city where people have visited while infectious with COVID-19.
READ MORE: Australia on knife's edge as COVID spreads to states and territories
The latest location of concern is Sydney Airport's T2 Domestic terminal, NSW Health said in its latest alert on Sunday night.
Anyone who was at the food court of the terminal between 5am and 10am on Thursday, June 24, is considered a close contact and should immediately get tested and isolate for 14 days, regardless of the result. Anyone else who was at the airport during those hours is a casual contact and should get tested and self-isolate until they get a negative result.
The 30 new cases revealed on Sunday have all been linked to known clusters, however there were 19 who were not in isolation while they were infectious.
The number of cases linked to the Bondi cluster has grown to 110.
"I also do want to foreshadow that given how contagious this strain of the virus is, we do anticipate that in the next few days case numbers are likely to increase even beyond what we've seen," Ms Berejiklian said.
READ MORE: Sydney Airport terminal among latest hotspot locations
Testing will be crucial to keep the outbreak under control, authorities said, with more than 52,000 conducted on Saturday, some of the highest numbers since the pandemic hit.
"If we all take this very seriously, we maintain those testing numbers, then two weeks (of lockdown) may be sufficient," Chief Health Officer Dr Kerry Chant said.
In Sydney, seafood wholesaler Great Ocean Foods in Marrickville has emerged as a key venue of concern.
Ten cases have been linked to the wholesaler, where two staff members worked while infectious.
Anyone who visited the Marrickville site or received a delivery from them at any time from June 21 through to June 25 should immediately isolate, call NSW Health on 1800 943 553 and get tested.
Their household contacts must also isolate with them and await advice from NSW Health.
READ MORE: Darwin residents given 90 minutes to prepare for first lockdown
In a separate case, an infected person went to the vaccination centre at Westmead Hospital, Dr Chant said.
She assured people all healthcare workers were wearing masks, social distancing was in place, and the area where the person went had been cleaned.
"As a precaution, we are very conservative, we have called the people that attended that vaccine centre in a period before and after the case and also looked at healthcare staff that may have been close contacts," Dr Chant said.
You can find out more details about how to book your vaccine through the Federal Government health site here.
