A high school student is among six new cases of COVID-19 in NSW, while three residents at aged care home Newmarch House are awaiting test results after showing flu-like symptoms.
NSW Health on Saturday confirmed the 18-year-old man from Green Point Christian College was the possible case reported on Friday.
"However, results indicate this is a past infection and not an active case," the department said in a statement.
The school on Friday announced it had closed for the day, but later reported the student had been cleared "and is not infectious".
"NSW Health has advised that no further action is required by the school, but as always, they encourage anyone who develops symptoms to be tested," principal Phillip Nash said on Facebook.
The five other cases confirmed on Saturday are all returned travellers in hotel quarantine.
Meanwhile, four residents at Newmarch House were tested after showing symptoms of respiratory illness, with one returning a negative result and the other results expected later on Saturday.
The outbreak at the western Sydney facility was declared over in mid-June with 37 residents and 34 staff catching the virus and 19 residents dying.
NSW Health said on Saturday 189 coronavirus cases previously reported among crew on the Ruby Princess cruise ship had been reclassified as Australian cases and included in NSW totals, to be reported the World Health Organisation under international reporting obligations.
"The cases were reported by NSW Health at the time of diagnosis, but were not included in NSW totals as they were on board the ship and not in NSW when diagnosed.
"The cases were not associated with any further transmissions in Australia as they were managed on board the cruise ship."
The state's total number of cases is 3216. One person is in intensive care and 63 cases are being treated.
Health Minister Brad Hazzard has urged anyone who visited a Woolworths store in Balmain on June 27 and 28 to get tested after a male employee was diagnosed with COVID-19.
The man had been in hotel quarantine in Victoria from June 11 to June 26 after flying in from Bangladesh, and tested positive on the fourth day of his quarantine period.
Australian Associated Press