Alliance for Pandemic Preparedness

November 25, 2020

Reducing Travel-Related SARS-CoV-2 Transmission with Layered Mitigation Measures Symptom Monitoring Quarantine and Testing

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  • [Pre-print; not peer-reviewed] A model built to assess the relative impact of symptom monitoring, testing, and quarantine practices on transmission of SARS-CoV-2 by infected travelers suggests that quarantining for 14 days almost eliminates risk of transmission. The effectiveness of testing depended on timing and quality of the test, with the combination of a pre-travel test and a post-travel test 2 to 3 days after arrival reducing the risk of transmission by 45 to 70%. When combined with symptom monitoring and testing, a 7-day quarantine after arrival had similar effectiveness in preventing transmission to a 10-day or 14-day quarantine on its own.

Johansson et al. (Nov 24, 2020). Reducing Travel-Related SARS-CoV-2 Transmission with Layered Mitigation Measures Symptom Monitoring Quarantine and Testing. Pre-print downloaded Nov. 25 from https://doi.org/10.1101/2020.11.23.20237412