133 Molesworth Street
PO Box 5013
Wellington 6140
New Zealand
T+64 4 496 2000
24 August 2022
Neal Sales
By email: [FYI request #20026 email]
Ref: H2022008734
Tēnā koe Neal,
Response to your request for official information
Thank you for your request under the Official Information Act 1982 (the Act) to Manatū Hauora
Ministry of Health (Manatū Hauora) on 27 July 2022. You requested:
Please provide any information held by the Ministry of Health regarding the number or
percentage of people who have been infected with Covid 19 more than once (reinfected)
And whether those people are vaccinated against COVID-19 or not vaccinated against
COVID-19.
Please find the information you have requested in the table below:
Vaccination status
First infection
Reinfection Total
Fully vaccinated at least 7 days before
508,488
10,023
518,508
reported as a case.
No doses received prior to being reported as a
58,701
1,110
59,811
case.
Not eligible for vaccine due to being less than
214,569
2,085
216,654
12 years old.
Partially vaccinated.
15,000
288
15,285
Received booster at least 7 days before being
820,671
11,406
832,074
reported as a case.
Total
1,617,420
24,912
1,642,335
Manatū Hauora applies two data confidentiality methods for data that is not already released as
exact counts on the Ministry’s website, in accordance with best-practice confidentiality methods
recommended by Stats NZ. More information can be found on data practices at:
www.data.govt.nz/toolkit/privacy-and-security/understanding-data-confidentiality/data-
confidentiality-principles-and-methods-report/.
Two data confidentiality methods called perturbation and suppression have been applied.
Perturbation is the adding of random noise to data, for example, rounding up or rounding down,
and suppression is not providing data, where doing so could compromise confidentiality.
For data that is not already provided exactly on our website:
• All values between 1 and 5 are suppressed.
• Zero values are provided exactly, except for in sensitive categories where a zero value
may be suppressed to protect other low values.
• Values of 6 and above are perturbed using fixed random rounding to base 3 (FRR3).
This entails rounding values to neighbouring multiples of 3. For example, 11 may be
rounded to 12 or 9.
I trust this information fulfils your request. Under section 28(3) of the Act, you have the right to
ask the Ombudsman to review any decisions made under this request. The Ombudsman may
be contacted by email at:
[email address] or by calling 0800 802 602.
Please note that this response, with your personal details removed, may be published on the
Manatū Hauora website at:
www.health.govt.nz/about-ministry/information-releases/responses-
official-information-act-requests. Nāku noa, nā
Gill Hall
Group Leader, Intelligence, Surveillance and Knowledge Public Health Agency, Ministry of Health
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