Covid-19: What happened in New Zealand on 17 February rnz.co.nz - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from rnz.co.nz Daily Mail and Mail on Sunday newspapers.
University of Otago epidemiologist Professor Michael Baker
Photo: University of Otago, Wellington / Luke Pilkinton-Ching
She travelled first to Spain, and then onto the Netherlands, where she stayed with family, before flying home from London.
A couple of her relatives have tested positive for the virus since she left.
However, she stayed overnight at an airport hotel in London before her flight out of the UK, and arrived in Auckland on 30 December.
It means the last possible contact she had with her relatives would have been on 28 December.
She started showing symptoms on 15 January, nearly three weeks later.
Even if she caught it on the flight over from the UK, that would still mean the virus lay dormant for more than two weeks.