8 April 2022
C Nowland
By email: [FYI request #19028 email]
Dear C Nowland
Official Information Act Request
On 1 April 2022 you sent a request for information under the Official Information Act 1982 to
the Ministry of Health (reference H202204863), who transferred your request to ESR on 4
April 2022. The request transferred to ESR was as follows:
As the PCR test does not differentiate between covid variants, how many of the positive
PCR tests from 27/1/22 to 31/3/22 were sent for genomic sequencing to determine that the
variant was Omicron?
Our response to your request
As the PCR test does not differentiate between covid variants, how many of the
positive PCR tests from 27/1/22 to 31/3/22 were sent for genomic sequencing to
determine that the variant was Omicron?
ESR performed Whole Genome Sequencing on samples from 3,858 cases with a report date
between 27 January 2022 and 31 March 2022 (inclusive).
The following variants were observed:
•
58 Delta
•
3538 Omicron
•
262 Could not determine the variant.
Source: Cases reported to EpiSurv1 at 2359 hours 3 April 2022 & Whole Genome Sequencing outputs
available at 0900 hours 4 April 2022.
It should be noted that as case numbers have increased and as rapid antigen tests have
become more widely used, only a subset of PCR positive cases has been sequenced.
This sample is influenced by urgent sequencing requests from public health units and may
not accurately reflect the distribution of Omicron and Delta cases circulating. Whole Genome
Sequencing is a time and resource-intensive process and results are not available instantly.
1 EpiSurv collates notifiable disease information on a real-time basis from the Public Health Services in
New Zealand.
Your right to seek a review
You have the right to seek an investigation and review by the Ombudsman of this decision.
Information about how to make a complaint is available at www.ombudsman.parliament.nz
or freephone 0800 802 602.
Thank you for your request.
Yours sincerely
Jill Vintiner
Joint General Manager Health and Environment - Health ESR