ArticleInternational journal of environmental research and public health2021
Reopening International Borders without Quarantine: Contact Tracing Integrated Policy against COVID-19.
Article in International journal of environmental research and public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Good Practices for Managing Acute Respiratory Viral Infections at Aerial Entry Points: A Scoping Review.Journal of epidemiology and global health · 2026Article
- The Risk from Reopening International Travel During a Disease X Pandemic: A Case Study of SARS-CoV-2.Risk analysis : an official publication of the Society for Risk Analysis · 2026Article
- Community perspectives on COVID-19 vaccine allocation ethical principles in Uganda: a cross-sectional study.Frontiers in public health · 2026Article
- Changes in long-term employment and income following COVID-19 (SARS-CoV-2) infection among Jewish and Arab populations in Israel.BMC public health · 2025Article
- Article
- Spatial variations of the third and fourth COVID-19 waves in Hong Kong: A comparative study using built environment and socio-demographic characteristics.Environment and planning. B, urban analytics and city science · 2023Article
- Impact of vaccination and non-pharmacological interventions on COVID-19: a review of simulation modeling studies in Asia.Frontiers in public health · 2023Review
- The Effect of Transborder Mobility on COVID-19 Incidences in Belgium.International journal of environmental research and public health · 2022Article
- Optimizing national border reopening policies in the COVID-19 pandemic: A modeling study.Frontiers in public health · 2022Article
Corrections and comments
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Authors and funding
14 authors.
Funding
Abstract
With the COVID-19 vaccination widely implemented in most countries, propelled by the need to revive the tourism economy, there is a growing prospect for relieving the social distancing regulation and reopening borders in tourism-oriented countries and regions. This need incentivizes stakeholders to develop border control strategies that fully evaluate health risks if mandatory quarantines are lifted. In this study, we have employed a computational approach to investigate the contact tracing integrated policy in different border-reopening scenarios in Hong Kong, China. Explicitly, by reconstructing the COVID-19 transmission from historical data, specific scenarios with joint effects of digital contact tracing and other concurrent measures (i.e., controlling arrival population and community nonpharmacological interventions) are applied to forecast the future development of the pandemic. Built on a modified SEIR epidemic model with a 30% vaccination coverage, the results suggest that scenarios with digital contact tracing and quick isolation intervention can reduce the infectious population by 92.11% compared to those without contact tracing. By further restricting the inbound population with a 10,000 daily quota and applying moderate-to-strong community nonpharmacological interventions (NPIs), the average daily confirmed cases in the forecast period of 60 days can be well controlled at around 9 per day (95% CI: 7-12). Two main policy recommendations are drawn from the study. First, digital contact tracing would be an effective countermeasure for reducing local virus spread, especially when it is applied along with a moderate level of vaccination coverage. Second, implementing a daily quota on inbound travelers and restrictive community NPIs would further keep the local infection under control. This study offers scientific evidence and prospective guidance for developing and instituting plans to lift mandatory border control policies in preparing for the global economic recovery.
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Registered trials
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