Number of measles case notifications

Number of measles notifications (confirmed and probable) by age and vaccination status – 1 January 2017 to 30 June 2018

Number of measles notifications (confirmed and probable) by age and vaccination status – 1 January 2017 to 30 June 2018
Age group Not vaccinated [1] Vaccinated within 14 days [2] Partially vaccinated [3] Fully vaccinated [4] Vaccinated but no dose information [5] Total number of cases
<15 months 2 1 0 0 0 3
15 months–3 years 2 0 0 1 0 3
4–9 years 2 0 0 0 0 2
10–19 years 4 0 0 2 0 6
20+ years  18 1 2 1 4 26
Total 28 2 2 4 4 40

Notes:

  1. Not vaccinated: A person who has not received any doses of vaccine or immunisation status is unknown.
  2. Vaccinated within 14 days: A person who has received one dose of vaccine within 14 days of the onset of disease. (This acknowledges that the dose may have been given when they were incubating the disease and would not have offered protection. During outbreaks of measles people who have been contacts of cases of measles and who are unsure of their immune status may receive a dose of vaccine. If they develop symptoms testing identifies whether the illness is due to vaccine or non-vaccine type of virus. Any notifications that are found to be due to a vaccine strain are considered not to be measles cases and are removed from the analysis.)
  3. Partially vaccinated: A person aged over 4 years that has received one dose of vaccine.
  4.  Fully vaccinated: A child aged between 12 months and 4 years who has received one dose of vaccine or a person aged 4 years or older who has received two doses of vaccine.
  5. Vaccinated but no dose information: Recorded as being immunised however no vaccination dose information was recorded.

Note: Vaccination status has been extracted from EpiSurv. Health professionals may use a range of sources to update vaccination status including the National Immunisation Register, parental recall and Well Child book records.

About this data

This report is based on information recorded on EpiSurv by public health service staff as at 29 August 2018. Changes made to EpiSurv data after this date will not be reflected in this extracted information. The results presented may be further updated and should be regarded as provisional. Cases still under investigation are not included in this report.

The majority (80%) of cases had either no history of measles vaccination, were partially vaccinated or were vaccinated within 14 days of illness onset, as reported in EpiSurv. Only four cases were reported as fully vaccinated. This is expected due to the high level of effectiveness of the measles vaccine which is over 99% effective for people who receive two doses of MMR. See the Measles chapter of the Immunisation Handbook for more information.

In October 2017, New Zealand achieved endemic measles (and rubella) elimination status, verified by the World Health Organization. However, outbreaks due to measles being imported from overseas are still possible. 95% of people need to be fully vaccinated against measles to prevent sustained outbreaks in New Zealand.


Find out more from the Ministry

  • Vaccine effectiveness – information on why some people who have been vaccinated still catch a disease
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