That is the question.

"Questions over how well NSW contact tracing system is coping"

A Sydney woman has been told she is a close contact from the Campsie shopping centre, four days after NSW Health identified the site as an exposure venue.

Key points:

• NSW Health said about 30,000 people have been contacted in relation to the Belrose and Campsie exposure sites
• A number of contacts say they are concerned about the lag between exposure sites being identified and them being notified
• Epidemiologist Professor Catherine Bennett said if there are lags it raises questions "about how well the system can cope"

The out-of-control outbreak in Campsie started with a single employee at the centre's Tong Li supermarket, who tested positive to COVID-19 on July 19.

But while other Tong Li employees were instructed by contact tracers to get tested immediately, the supermarket's clients and neighbouring shops were left in the dark

Justin Leach, who is currently in isolation with his wife, who shopped at Tong Li when the employee was working there while infectious, said the information was already circulating on social media well before contact tracers reached them.

"We found the time lag from when my wife had attended the supermarket to when we were being notified a bit concerning, particularly as the information had been circulated on social media earlier, which we ignored. So we were concerned at the delay," Mr Leach told 7.30.

Since the Tong Li case, workers at three other shops from the centre tested positive to COVID-19.

https://www.abc.net.au/news/2021-07-27/questions-over-how-well-nsw-contact-tracing-system-is-coping/100327436