The economic value of quarantine is higher at lower case prevalence, with quarantine justified at lower risk of infection

Review Immunology

Outdoor Transmission of SARS-CoV-2 and Other Respiratory Viruses: A Systematic Review

Tommaso Celeste Bulfone et al.

Summary: Studies have shown that only a small proportion of global SARS-CoV-2 infections have occurred outdoors, with indoor transmission being more likely compared to outdoor transmission. There is considerable heterogeneity in study quality and definitions of outdoor settings, which limits the ability to draw definitive conclusions about outdoor transmission risks.

JOURNAL OF INFECTIOUS DISEASES (2021)

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Article Economics

Optimal prevention and elimination of infectious diseases

Hippolyte d'Albis et al.

Summary: This article examines the optimal allocation of resources for preventing deterministic infectious diseases with an endemic steady-state. The optimal dynamics depend on the interplay between disease characteristics, labor productivity, and intergenerational equity. Phase diagram analysis shows multiple feasible trajectories, some converging to endemic steady-states and others to disease elimination. A "sooner-the-better" strategy is optimal if the discount rate is low enough.

JOURNAL OF MATHEMATICAL ECONOMICS (2021)

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Article Biology

Quantifying the impact of quarantine duration on COVID-19 transmission

Peter Ashcroft et al.

Summary: This study quantifies the impact of quarantine duration on the transmission of SARS-CoV-2 by considering factors such as incubation period, infectivity, and generation time. The findings suggest that quarantine strategies based on a test-and-release protocol perform almost as well as a 10-day quarantine in terms of epidemiological effectiveness, with fewer person-days spent in quarantine.

ELIFE (2021)

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Article Public, Environmental & Occupational Health

Comparative cost-effectiveness of SARS-CoV-2 testing strategies in the USA: a modelling study

Zhanwei Du et al.

Summary: This study aimed to evaluate the economic trade-offs of expanding and accelerating testing for SARS-CoV-2 across the USA in different transmission scenarios. The findings suggest that weekly testing combined with a 2-week isolation period is the most cost-effective strategy under rapid transmission scenarios, while monthly testing with a 1-week isolation period is most cost-effective under low transmission scenarios.

LANCET PUBLIC HEALTH (2021)

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Article Multidisciplinary Sciences

Time-dependent heterogeneity leads to transient suppression of the COVID-19 epidemic, not herd immunity

Alexei Tkachenko et al.

Summary: Research shows that during the early stages of an epidemic, a transient collective immunity state may emerge as herd immunity forms, but this state is fragile and fades over time, meaning that the infection peak does not necessarily indicate long-lasting herd immunity; factors such as seasonal changes can lead to subsequent waves.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2021)

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Article Multidisciplinary Sciences