Serological evidence of a pararubulavirus and a betacoronavirus in the geographically isolated Christmas Island flying-fox (Pteropus natalis).

Due to their geographical isolation and small populations, insular bats may not be able to maintain acute immunizing viruses that rely on a large population for viral maintenance. Instead, endemic transmission may rely on viruses establishing persistent infections within hosts or inducing only short-lived neutralizing immunity. Therefore, studies on insular populations are valuable for developing broader understanding of viral maintenance in bats. The Christmas Island flying-fox (CIFF; Pteropus natalis) is endemic on Christmas Island, a remote Australian territory, and is an ideal model species to understand viral maintenance in small, geographically isolated bat populations. Serum or plasma (n = 190), oral swabs (n = 199), faeces (n = 31), urine (n = 32) and urine swabs (n = 25) were collected from 228 CIFFs. Samples were tested using multiplex serological and molecular assays, and attempts at virus isolation to determine the presence of paramyxoviruses, betacoronaviruses and Australian bat lyssavirus. Analysis of serological data provides evidence that the species is maintaining a pararubulavirus and a betacoronavirus. There was little serological evidence supporting the presence of active circulation of the other viruses assessed in the present study. No viral nucleic acid was detected and no viruses were isolated. Age-seropositivity results support the hypothesis that geographically isolated bat populations can maintain some paramyxoviruses and coronaviruses. Further studies are required to elucidate infection dynamics and characterize viruses in the CIFF. Lastly, apparent absence of some pathogens could have implications for the conservation of the CIFF if a novel disease were introduced into the population through human carriage or an invasive species. Adopting increased biosecurity protocols for ships porting on Christmas Island and for researchers and bat carers working with flying-foxes are recommended to decrease the risk of pathogen introduction and contribute to the health and conservation of the species.

Quality adjusted life years in the time of COVID-19.

The quality adjusted life year (QALY) as a basis of valuing additional expenditure on health is widely accepted. Although early in the COVID-19 pandemic, several commentators called for a similar approach in resolving trade-offs between economic activity and reducing the burden of COVID-19, this has not occurred. The value of a QALY has not been used to deny all intervention, as the rule of rescue attests. Further, while there was no other way of managing the pandemic, there were other means available to mitigate the economic losses. Now that vaccine programs have commenced in several countries, it is interesting to consider whether economic evaluation should now be applied. However, the recognised complexities of the evaluation of vaccines, plus the challenge of measuring opportunity costs in the face of an economic recession and the severity of the consequences of an outbreak even though the probability of transmission is exceedingly low, mean its use will be restricted. COVID-19 has changed everything, even the way we should think about economic evaluation.

General practice's early response to the COVID-19 pandemic.

The COVID-19 pandemic has resulted in multiple changes in the delivery of general practice services. In response to the threat of the pandemic and in order to keep their businesses safe and viable, general practices have rapidly moved to new models of care, embraced Medicare-funded telehealth and responded to uncertain availability of personal protective equipment with innovation. These changes have shown the adaptability of general practice, helped keep patients and practice staff safe, and undoubtedly reduced community transmission and mortality. The pandemic, and the response to it, has emphasised the potential dangers of existing fragmentation within the Australian health system, and is affecting the viability of general practice. These impacts on primary care highlight the need for improved integration of health services, should inform future pandemic planning, and guide the development of Australia's long-term national health plan.