2022
DOI: 10.1101/2022.07.12.22277518
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Tracing the international arrivals of SARS-CoV-2 Omicron variants after Aotearoa New Zealand reopened its border

Abstract: Recently there has been a surge in emergent SARS-CoV-2 lineages that are able to evade both vaccine induced immunity as well as prior infection from the founding Omicron BA.1 and BA.2 lineages. These highly transmissible and evasive lineages are on the rise and include Omicron variants BA.2.12.1, BA.4, and BA.5. Aotearoa New Zealand recently reopened its borders to many travellers, without their need to enter quarantine. By generating 10,403 complete SARS-CoV-2 genomes classified as Omicron, we show that New Z… Show more

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Cited by 2 publications
(5 citation statements)
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“…BA.2 followed soon after and its transmission advantage saw it rapidly displace BA.1. Genomics demonstrated that in the first half of 2022 approximately 85% of all New Zealand cases were BA.2 -we largely skipped the first Omicron BA.1 wave [14].…”
Section: Genomics Under Suppressionmentioning
confidence: 99%
See 3 more Smart Citations
“…BA.2 followed soon after and its transmission advantage saw it rapidly displace BA.1. Genomics demonstrated that in the first half of 2022 approximately 85% of all New Zealand cases were BA.2 -we largely skipped the first Omicron BA.1 wave [14].…”
Section: Genomics Under Suppressionmentioning
confidence: 99%
“…By March 2022, the MIQ system was dismantled, and New Zealand opened to citizens, permanent residents and work visa holders without the need to self-isolate until testing positive. Pre-departure tests were dropped by mid-June 2022 coinciding with the arrival of subvariants BA.4, BA.5, BA.2.12.1 and BA.2.75 -first at the border, then in the community [14]. In mid-2022, using the genomes of border detections compared to community cases we estimate that there is about one new incursion per day into the community from the ~8000 international daily arrivals.…”
Section: Genomics Under Suppressionmentioning
confidence: 99%
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“…The B.1.1.529 (Omicron) variant of SARS-CoV-2 was designated a variant of concern by the World Health Organization on 26 November 2021 [1] subsequent to a rapid growth in cases of COVID-19 in southern Africa [2]. Following transmission from cases in managed isolation facilities into the community in January 2022 [3], New Zealand experienced a large Omicron wave with a cumulative attack rate of around 220 confirmed cases per 1000 people between 1 February and 31 May 2022. This wave was dominated by the BA.2 subvariant, which accounted for an estimated 84% of cases, with BA.1 accounting for the remaining 16%.…”
Section: Introductionmentioning
confidence: 99%