"Genomic sequencing is one of a range of factors, alongside clinical history, PCR test results and serology in considering whether cases are historical. The local public health unit has considered these factors in making its clinical assessment of the case."
Health officials have not yet been able to find the source of the infection or link the case to the three other confirmed cases in returnees who stayed at the Pullman then tested positive after leaving.
The total number of active cases in New Zealand is 66 while the total number of confirmed cases is 1964.