Australia Post Kingsgrove the only new COVID concern venue in St George

The last alert for Sutherland Shire was on July 31 and involved a train service from Caringbah on July 19.

The new alert in St George is:

NSW Health said anyone who visited the venues at the times listed is a casual contact and must immediately get tested and isolate until a negative result is received.

"Please get tested even if you have had a test in recent days. If your exposure at this venue was in the past four days, you must get another test on day five from the date of exposure.

"Wear a mask around others and limit your movements until you get another negative result.

"You should continue to monitor for symptoms and if any symptoms appear, get tested and isolate again.

"Please continue to check this page regularly, as the list of venues of concern and relevant health advice are being updated as new cases emerge and investigations continue.

Anyone with even the mildest of cold-like symptoms is urged to immediately come forward for testing and isolate until a negative result is received.

"There are more than 400 COVID-19 testing locations across NSW, many of which are open seven days a week. To find your nearest clinic visit COVID-19 testing clinics or contact your GP."