Thousands of people have potentially been exposed to the coronavirus after two Woolworths team members worked a number of shifts while infectious at the same store.
NSW Health is warning people who attended the Woolworths supermarket at Glenrose Village in Belrose to check the times they visited the store to identify whether they are considered a close contact.
The health department is concerned about anybody who shopped at the store on the following dates between the specified times:
Saturday July 10 between 8.30am and 8.40am
Thursday July 15 between 7.30am and 9am
Friday July 16 between 5.55am and 4.30pm
Saturday July 17 between 5.55am and 4.30pm
Sunday July 18 between 5.55am and 4.30pm
Monday July 19 between 6am and 4pm
Tuesday July 20 between 7.30am and 9am
Anybody who visited the supermarket between those times is required to get a Covid test immediately and self-isolate for 14 days regardless of the result.
Woolworths confirmed in a statement two team members at the Glenrose Village store tested positive for coronavirus and are self-isolating.
"Their safety and wellbeing is our priority and we'll continue to support them in any way we can," a Woolworths spokesperson said.
The team members last worked on July 18 and 19, with neither employee presenting symptoms while at work.
Woolworths became aware of the first case on July 20 and the second on July 21 and said there was no evidence at this stage to suggest the transmission occurred in the workplace.
"We're making contact with our team members and providing our full support to those required to self-isolate in line with advice from the health authorities," the statement said.
"As a food retailer, we already have very high standards of cleaning and hygiene in place."
As a precautionary measure Woolworths undertook a deep clean on both July 20 and July 21.
Woolworths said both customers and team members should be assured they can still safely shop and work at the Glenrose Village store.
When will NSW lockdown end?
The state reported a further 110 new coronavirus cases on Thursday as Greater Sydney waits to see if stricter lockdown rules to contain the virus have worked so the region can be released.
Premier Gladys Berejiklian told reporters on Wednesday it would be clear within days whether or not the measures have been enough.
"We need to wait until at least the weekend and early next week to see the impact of those harsher restrictions," NSW Premier Gladys Berejiklian said.
The virus must be quashed before restrictions can be lifted but the premier won't be drawn on whether her government could go harder if daily case numbers don't start to improve.
The lockdown is currently due to end on July 30.
Nursing home locked down
Nursing home in Sydney's south is in lockdown after a nurse tested positive for Covid-19.
NSW Health says visitors or non-essential staff should not enter The Palms, in Kirrawee, and affected staff - some of whom are not vaccinated - have been isolated and will be tested within the next 24 hours.
"Thankfully, most of our residents are fully vaccinated against Covid-19," the home said in a statement.
"We are treating all residents as close contacts of the affected staff member whilst we assess the situation in more detail."
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