Clinical features of patients hospitalised with COVID-19 from February to October 2020, during the early waves of the pandemic in New Zealand.

AIM: As New Zealand transitions towards endemic SARS-CoV-2, understanding patient factors predicting severity, as well as hospital resourcing requirements will be essential for future planning. METHODS: We retrospectively enrolled patients hospitalised with COVID-19 from 26 February to 5 October 2020 as part of the COVID-19 HospitalisEd Patient SeverIty Observational Study NZ (COHESION). Data on demographics, clinical course and outcomes were collected and analysed as a descriptive case series. RESULTS: Eighty-four patients were identified across eight district health boards. Forty-one (49%) were male. The median age was 58 years [IQR: 41.7-70.3 years]. By ethnicity, hospitalisations included 38 NZ European (45%), 19 Pasifika (23%), 13 Maori (15%), 12 Asian (14%) and 2 Other (2%). Pre-existing co-morbidities included hypertension (26/82, 32%), obesity (16/66, 24%) and diabetes (18/81, 22%). The median length of stay was four days [IQR: 2-15 days]. Twelve patients (12/83, 14%) were admitted to an intensive care unit or high dependency unit (ICU/HDU). Ten (10/83, 12%) patients died in hospital of whom seven (70%) were not admitted to ICU/HDU; the median age at death was 83 years. CONCLUSION: Despite initially low case numbers in New Zealand during 2020, hospitalisation with COVID-19 was associated with a high mortality and hospital resource requirements.

Politicians: please work together to minimise the spread of COVID-19

If the virus spreads further throughout our communities, and authorities ask people to limit social contact and self-isolate, cooperation with these necessary measures will play a crucial role in minimising COVID-19's spread and protecting the most vulnerable among us. Teams of infectious disease, public health and primary care experts are advising the Government on the best way to deal with this threat.

Antimicrobial stewardship in human healthcare in Aotearoa New Zealand: urgent call for national leadership and co-ordinated efforts to preserve antimicrobial effectiveness

Within 30 years, the global number of deaths from AMR-associated infections is predicted to increase from ~700,000 to ~10 million people annually, if we do not act now.1 The Aotearoa New Zealand (NZ) response to the current COVID-19 pandemic has been lauded internationally-found-ed in science, responsive to expert advice, implemented with clear leadership and communication, and subject to ongoing critical evaluation and improvement. AMR-associated infections and related care (eg, time off work or school to travel to hospital for treatment) will disproportionately impact the most socioeconomically disadvantaged among us, those living in rural or remote settings, and Maori and Pacific populations who shoulder a greater infection and AMR burden and have increased reliance on antimicrobial therapy.6'7 One of the biggest drivers for AMR is antimicrobial use, which is high in human health in NZ compared with many developed countries.8'9 Most of our antimicrobial use (95%) is in the community9 and up to 50% may be inappropriate.2 The NZ community antibacterial consumption rate increased 49% between 2006 and 2014;in 2013, it exceeded that of 22 out of 29 European countries.8 A subsequent modest 14% decrease occurred across 2015 to 2018, mainly due to reductions in under 5 year olds,10 which is pleasing as antimicrobial use in childhood may create reservoirs of resistant pathogens impacting communities cross-generationally. In 2013, the Health Quality and Safety Commission (HQSC) published a scoping report that offered insight into what was needed to progress AMS in NZ.14 Key recommendations were to establish: * National leadership and coordination of AMS activities * National antimicrobial prescribing guidelines * Quality improvement tools and measures In the near decade that has followed this report, none of these recommendations have been achieved. The NCAMS should provide access to (and support use of) quality improvement tools (eg, auditing systems for between facility benchmarking), develop initiatives to improve antimicrobial use (including those involving consumers), monitor performance against quality markers, and establish clinical care standards with the oversight of NAMSEG.

The impacts of New Zealand's COVID-19 epidemic response on community antibiotic use and hospitalisation for pneumonia, peritonsillar abscess and rheumatic fever.

BACKGROUND: The rate of community antibiotic use in New Zealand (NZ) is high and some may be unnecessary. Non-pharmaceutical public health interventions (Alert Levels) were implemented in 2020 to reduce the spread of COVID-19 in NZ and were likely to have affected antibiotic prescribing. METHODS: We aimed to identify the impact of these public health interventions on community antibiotic dispensing. We also examined rates of hospitalisation with infectious diseases that could be influenced by changing community antibiotic use. A retrospective review of two national databases was undertaken. FINDINGS: 1.17 million people received 1.19 million prescriptions for antibiotics between 23/02/2020 and 18/07/2020. Antibiotic dispensing rates fell from 14 prescriptions per 1000 population per week during pre-Alert Level weeks to 9 prescriptions per 1000 population per week (a reduction of 36%) during the weeks of COVID Alert Level 3-4. Large reductions were seen with antibiotics predominantly used for respiratory- or urinary-tract infections. Hospital discharges with sentinel infections did not increase over this period; pneumonia discharges during Alert Level weeks were lower than in 2017-2019 (3 vs 6 discharges per 100,000 population). INTERPRETATION: A large reduction in community antibiotic dispensing was observed in NZ during the implementation of non-pharmaceutical public health interventions to eliminate COVID-19. Despite this marked reduction in antibiotic use, there was no increase in rates of hospitalisation for sentinel infections that community antibiotic use could prevent. These findings suggest that countries with high rates of antibiotic use could significantly reduce their use without an increase in morbidity. FUNDING: No financial support received.

Collaborative networks enable the rapid establishment of serological assays for SARS-CoV-2 during nationwide lockdown in New Zealand.

BACKGROUND: Serological assays that detect antibodies to SARS-CoV-2 are critical for determining past infection and investigating immune responses in the COVID-19 pandemic. We established ELISA-based immunoassays using locally produced antigens when New Zealand went into a nationwide lockdown and the supply chain of diagnostic reagents was a widely held domestic concern. The relationship between serum antibody binding measured by ELISA and neutralising capacity was investigated using a surrogate viral neutralisation test (sVNT). METHODS: A pre-pandemic sera panel (n = 113), including respiratory infections with symptom overlap with COVID-19, was used to establish assay specificity. Sera from PCR­confirmed SARS-CoV-2 patients (n = 21), and PCR-negative patients with respiratory symptoms suggestive of COVID-19 (n = 82) that presented to the two largest hospitals in Auckland during the lockdown period were included. A two-step IgG ELISA based on the receptor binding domain (RBD) and spike protein was adapted to determine seropositivity, and neutralising antibodies that block the RBD/hACE­2 interaction were quantified by sVNT. RESULTS: The calculated cut-off (>0.2) in the two-step ELISA maximised specificity by classifying all pre-pandemic samples as negative. Sera from all PCR-confirmed COVID-19 patients were classified as seropositive by ELISA ≥7 days after symptom onset. There was 100% concordance between the two-step ELISA and the sVNT with all 7+ day sera from PCR­confirmed COVID-19 patients also classified as positive with respect to neutralising antibodies. Of the symptomatic PCR-negative cohort, one individual with notable travel history was classified as positive by two-step ELISA and sVNT, demonstrating the value of serology in detecting prior infection. CONCLUSIONS: These serological assays were established and assessed at a time when human activity was severely restricted in New Zealand. This was achieved by generous sharing of reagents and technical expertise by the international scientific community, and highly collaborative efforts of scientists and clinicians across the country. The assays have immediate utility in supporting clinical diagnostics, understanding transmission in high-risk cohorts and underpinning longer­term 'exit' strategies based on effective vaccines and therapeutics.