The neighbour was classed as a close contact of the AUT student - also known as Case D - and has been in the Auckland quarantine facility since November 12.
The Auckland Regional Public Health Unit has also identified seven close contacts and three casual contacts. All have been contacted and testing arranged.
Testing for all 10 contacts is expected to be completed by the end of the day.
Yesterday, the highest number of poster scans was recorded since September 26; there were more than 1.1 million scans and more than 500,000 people using the app.