Global Health Security Index and COVID-19 pandemic mortality 2020–2021: a comparative study of islands and non-islands across 194 jurisdictions

The GHS Index demonstrated clear associations with favourable health outcomes of non-island jurisdictions through the COVID-19 pandemic, supporting its use to guide pandemic preparedness investments. Contrasting findings for islands suggest the need to enhance how the Index measures border biosecurity capacities and capabilities, including the ability to support the exclusion/elimination strategies that successfully protected islands during the COVID-19 pandemic.