NSW Health authorities have confirmed a teacher from Sydney's eastern suburbs has been diagnosed with coronavirus - although they are investigating whether it is an older infection.
The case - one of four confirmed in the state over the previous 24 hours - caused Rose Bay Public School to be closed on Friday.
NSW Health said they were investigating the source of the infection in the school worker.
"The date of infection is still to be determined and this case may be an older infection," NSW Health said in a statement.
"The source of infection is also being investigated. As a precaution, all close contacts of this case are being identified and advised of the need to isolate and monitor for symptoms."
The confirmation brings to an end the state's two-week long streak of having no community-transmitted infections.
A man in his 20s has also tested positive for coronavirus, with NSW Health saying he had not attended any recent mass gatherings or protests.
The other two cases recorded on Friday were international travellers who were already in quarantine.
"People with mild symptoms or those who show no obvious symptoms can unknowingly pass it to others," NSW Health said.
"NSW Health is urging anyone feeling unwell – even with the mildest of symptoms such as a runny nose or scratchy throat – to isolate from others and get tested."
There have been 3119 cases of coronavirus in NSW with 47 currently being treated.
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