Six more people in New South Wales have been diagnosed with coronavirus, taking the national total to 113.

The new patients include four women and two men, most of who recently travelled overseas.

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One of the women, aged in her 30s, is linked to an elderly patient from the Dorothy Henderson Lodge Aged Care Facility who died last week, NSW Health said.

The 95-year-old female resident became the second Australian to die from coronavirus.

A woman and man, both aged in their 50s but unrelated, both recently arrived from the US prior to being diagnosed.

St Patrick’s Marist College will remain closed on Wednesday as health authorities investigate a coronavirus exposure. Credit: Google Street View

Another man, aged in his 60s, recently arrived from Switzerland.

Another woman, aged in her 60s, recently travelled back to Australia from Italy and is linked to a previous close contact.

The sixth case, a woman aged in her 40s, remains under investigation.

So far, there have been 61 confirmed cases in NSW, with more than 9000 other potential cases being tested and returning a negative result.

The national total is now at 113 after three more people were also diagnosed in Queensland.

NSW Health revealed on Tuesday night a previous positive case had visited St Leonards TAFE in north Sydney on two days while infectious.

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“Although it has been more than 14 days since the last day of attendance by the confirmed case, NSW Health has been contacting all other students and teachers in these classes, with the assistance of TAFE NSW,” NSW Health said in a statement.

The health department was able to reach 20 of the 21 people who came into contact with the patient and will continue to follow up with the last person.

The latest cases come after schools in Sydney were closed following confirmed cases of the virus.

St Patrick’s Marist College in Dundas will be closed for at least one more day, on Wednesday, after two students tested positive for coronavirus.

The two students were confirmed as having the virus on Monday, resulting in the school’s closure on Tuesday.

A Year 7 pupil from Willoughby Girls High School was diagnosed at the same time.