August 24, 2020

Quarantine and Testing Strategies in Contact Tracing for SARS-CoV-2

Category: Article Summary

Topic: Modeling and Prediction

Keywords (Tags): modeling prediction, non-pharm interventions

• [pre-print, not peer-reviewed] Modeling by Quilty et al. found that for known contacts of COVID-19 cases, a quarantine period of at least ten days, combined with a PCR test on day nine, may yield similar results to a 14-day quarantine period in terms of averted transmission potential from secondary cases. Fourteen days of quarantine averted approximately 84% of transmission, while ten days and a test on day 9 averted approximately 81%. However, the model assumes a relatively short period (less than 4.5 days, on average) from the index case’s symptom onset to tracing of secondary contacts.

Quilty et al. (Aug 24, 2020). Quarantine and Testing Strategies in Contact Tracing for SARS-CoV-2. Pre-print downloaded August 21 from https://doi.org/10.1101/2020.08.21.20177808