Number of mumps case notifications

Number of mumps notifications (confirmed and probable) by age and vaccination status, 1 January 2017 to 31 May 2018

Age group Not vaccinated [1] One dose [2] Two doses [2] Vaccinated- no dose information [3] Unknown [4] Total
Number of mumps notifications (confirmed and probable) by age and vaccination status, 1 January 2017 to 31 May 2018
<1 year 11 0 0 0 3 14
1—4 years 18 25 7 0 25 75
5–9 years 20 6 78 1 29 134
10–14 years 43 17 75 0 55 190
15–19 years 83 30 114 4 156 387
20–29 years 109 30 103 33 338 613
30–39 years 26 5 3 4 81 119
40–49 years 23 0 2 1 42 68
50–59 years 16 0 0 1 32 49
60–69 years 6 0 0 1 8 15
70+ years 0 0 0 0 3 3
Total 355 113 382 45 772 1667

Notes:

  1. Not vaccinated: A person who is recorded in EpiSurv as being not vaccinated.
  2. Number of mumps vaccine doses reported for cases who were recorded as being immunised in EpiSurv.
  3. Vaccinated – no dose information: Recorded as being immunised however no vaccination dose information was recorded in EpiSurv.
  4. Unknown: Cases which had no immunisation status recorded or status is recorded as unknown. Immunisation data is not a priority field for completion in regions that have moved to a ‘Manage it’ phase once an outbreak is established, and hence many cases will have immunisation status recorded as unknown.

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 19 June 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 immunisation status was unknown for 46% (772 of the 1667) of cases reported in EpiSurv. Immunisation data is not a priority field for completion in regions that have moved to a ‘Manage it’ phase once an outbreak is established, such as in the Auckland region in 2017, therefore many cases will have immunisation status recorded as unknown.

In populations where immunisation coverage is high, a greater proportion of the population is protected because immunisation reduces the occurrence and severity of disease. In this situation a higher proportion of those who develop disease are likely to be immunised. This is expected due to two doses of the vaccine being 83-88% effective. See the Mumps chapter of the Immunisation Handbook for more information.


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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