A teacher at Auckland's Green Bay High School has been tested for the novel coronavirus (COVID-19), the school confirmed to Newshub on Thursday.
Principal Fiona Barker said a relative of the teacher's flatmate is one of New Zealand's 20 confirmed cases of COVID-19.
"The teacher and the infected person have not interacted," she said.
"The teacher was tested on Wednesday and we expect the results back on Friday."
The staff member had "limited interaction" with their flatmate, according to a statement issued to parents and the wider school community.
The teacher is currently self-isolating as per Ministry of Health protocol.
The college remains open and "things are as normal" for its 1400 pupils, says Barker, other than the cancellation of the school ball. On Monday, Prime Minister Jacinda Ardern advised all gatherings of more than 500 people should be called off amid the outbreak.
The school will release any updated information to the community when it becomes available.
Eight new cases of COVID-19 were confirmed on Wednesday, boosting New Zealand's total to 20. The Ministry of Health says the 20 cases are all due to overseas travel and there is no community outbreak within New Zealand.
Logan Park High School in Dunedin has closed for at least two days after a student tested positive for the virus. The teen became infected after their father, who was also diagnosed, recently returned to New Zealand from Germany.