Family-run businesses in Gwynneville and Bellambi have emerged as new COVID-19 exposure sites after visits from people with the virus.
The owners of Sam and Nic's IGA Xpress in Bellambi advised customers via social media that someone with COVID-19 visited their Cawley Street store on Monday and Tuesday.
They said NSW Health had told them they could continue operating, but due to the number of staff who had been required to self-isolate, they had decided to close until further notice.
The shop had been deep-cleaned, they said, and they had "taken every precautionary procedure".
The supermarket has not yet been added to NSW Health's list of venues of concern, and the times the person with COVID visited the store have not been disclosed.
Meanwhile, NSW Health says anyone who attended Gwynneville Bakery in Gipps Road on Saturday, July 24, between 9am and 9.30am is a close contact of a COVID-19 case.
This means they must get tested immediately and isolate for 14 days, regardless of the test result.
Gwynneville Bakery owner Jim Patrinos said NSW Health had not instructed him to close or conduct deep cleaning, but the two staff members who were working at that time were now in isolation.
But opening hours had been cut by two and a half hours each day, Mr Patronis said, because he could not cover the affected employees' hours.
"I just maintain my normal cleaning standards and trade as I normally do," he said.
Mr Patrinos shared the news his business had been listed as a venue of concern on Facebook, which was met with warm wishes from customers.
"I would love to thank each and every one of them... and I really appreciate the support," he said.
Anyone who attended Gwynneville Bakery at the time of concern who has not been contacted by NSW Health is asked to call 1800 943 553.
Meanwhile, the Bunnings store at Bellambi remains on NSW Health's list of venues of concern after it emerged as an exposure site earlier this week.
Anyone who visited the store between 11am and 11.15am last Tuesday, July 20 is considered a casual contact, and should get tested immediately and isolate until they receive a negative result.
Earlier venues still on the list include the 7-Eleven, Priceline and Woolworths stores in Dapto; Woolworths in Wollongong; Wollongong Dermatology; and Bubbleberry in the Wollongong CBD.
Details of times and instructions can be found online.
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