Wellington medical officer of health Margot McLean says she is not sure why the number of influenza cases has been so low this year.
According to the latest figures, the peak weekly consultation rate for influenza-like illnesses this year is 60 consultations per 100,000 people.
This is well below the peak of 151 per 100,000 people in 2010 and 284 in 2009.
Dr McLean does not see any concrete reason why this year's tally should be so low, but says the swine flu of 2009 and 2010 means the consultation rate in those years was very high.
