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Estimating the potential impact and diagnostic requirements for SARS-CoV-2 test-and-treat programs
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Journal Article
Estimating the potential impact and diagnostic requirements for SARS-CoV-2 test-and-treat programs
2023
Overview
Oral antivirals have the potential to reduce the public health burden of COVID-19. However, now that we have exited the emergency-phase of the COVID-19 pandemic, declining SARS-CoV-2 clinical testing rates (average testing rates =
≪
10 tests/100,000 people/day in low-and-middle income countries; <100 tests/100,000 people/day in high-income countries; September 2023) make the development of effective test-and-treat programs challenging. We used an agent-based model to investigate how testing rates and strategies affect the use and effectiveness of oral antiviral test-to-treat programs in four country archetypes of different income levels and demographies. We find that in the post-emergency-phase of the pandemic, in countries where low testing rates are driven by limited testing capacity, significant population-level impact of test-and-treat programs can only be achieved by both increasing testing rates and prioritizing individuals with greater risk of severe disease. However, for all countries, significant reductions in severe cases with antivirals are only possible if testing rates were substantially increased with high willingness of people to seek testing. Comparing the potential population-level reductions in severe disease outcomes of test-to-treat programs and vaccination shows that test-and-treat strategies are likely substantially more resource intensive requiring very high levels of testing (≫100 tests/100,000 people/day) and antiviral use suggesting that vaccination should be a higher priority.
Antivirals are now available for treating COVID-19 but must be used early in the course of infection to be effective. Here, the authors use mathematical modelling to assess the potential public health impacts of antiviral use considering different levels of testing and country sociodemographic characteristics.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
