Alliance for Pandemic Preparedness

June 7, 2021

Early Epidemiological Evidence of Public Health Value of WA Notify a Smartphone-Based Exposure Notification Tool Modeling COVID-19 Cases Averted in Washington State

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  • [Pre-print, not peer-reviewed] A study of the impact of Washington State’s exposure notification tool, WA Notify, in mitigating the spread of COVID-19 during the first four months of implementation found that based on an estimated COVID-19 case fatality of 1.4%, WA Notify saved 30-120 lives over this period. A model was run on a range of secondary attack rates (5.1-13.7%) and quarantine effectiveness (53–64%); assuming a 12% secondary attack rate and 53% quarantine effectiveness, 6,240 cases were expected to be averted statewide during the four-month period. 

Segal et al. (June 7, 2021). Early Epidemiological Evidence of Public Health Value of WA Notify a Smartphone-Based Exposure Notification Tool Modeling COVID-19 Cases Averted in Washington State. Pre-print downloaded Jun 7 from https://doi.org/10.1101/2021.06.04.21257951