The infected Rydges Hotel maintenance worker who has tested positive for Covid-19 remains a mystery.
Genetic sequencing has linked his case to the same strain of virus found in a woman who stayed at the hotel between 28 July and 31 July after returning from the United States.
There's no evidence the worker had any direct contact with the traveller.
Auckland University microbiologist Siouxsie Wiles speaks to Susie Ferguson.
