NSW teen confirmed to have had coronavirus, no longer infectious

An 18-year-old on the NSW Central Coast has been confirmed to have had coronavirus, the only diagnosis in the state outside of hotel quarantine.

But testing revealed he no longer has the disease.

On Thursday it was reported that the student from Green Point Christian College may have COVID-19.

But results made public today indicate that while the boy had the disease, it is no longer active.

Students at the school south of Gosford were sent home on Thursday following the possible case.

School principal Phillip Nash informed parents and students via a Facebook post last night.

"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," Mr Nash said.

"Whilst we understand that it was disruptive to have the school closed today, it was important that we take these precautions to ensure the safety and well-being of our students and staff."

Five others in the state were diagnosed yesterday, all of them returned travellers in hotel quarantine.

Another previously reported case has now been excluded following further investigation.

The total number of recorded COVID-19 cases in NSW is now 3216, with around 500 yet to fully recover.

Sixty-three are being treated by NSW Health, with one in intensive care. They are not on a ventilator.

"Anyone feeling unwell - even with the mildest of symptoms such as a runny nose or scratchy throat – is urged to self-isolate and seek testing," a statement from NSW Health read.

"It is essential people follow directions they receive about home isolation and quarantine and maintain COVID-safe practices of physical distancing of 1.5 metres and regularly wash their hands."

More than 16,000 tests were conducted yesterday, adding to the 900,000 carried out in the state overall.

In Queensland, no positive coronavirus cases were recorded overnight.