Individual-Level Evaluation of the Exposure Notification Cascade in the SwissCovid Digital Proximity Tracing App: Observational Study

Tala Ballouz   ¹ , MPH, MD ;   Dominik Menges   ¹ , MPH, MD ;   Hélène E Aschmann   ^{1, 2} , PhD ;   Ruedi Jung   ¹ , PhD ;   Anja Domenghino   ^{1, 3} , MD ;   Jan S Fehr   ¹ , MD ;   Milo A Puhan   ¹ , MD, PhD ;   Viktor von Wyl   ^{1, 4} , MSc, PhD

¹ Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland

² Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, United States

³ Department of Visceral and Transplantation Surgery, University Hospital Zurich, University of Zurich, Zurich, Switzerland

⁴ Institute for Implementation Science in Health Care, University of Zurich, Zurich, Switzerland