A Survey of COVID-19 Contact Tracing Apps Ahmed, Nadeem ; Michelin, Regio A. ; Xue, Wanli ; Ruj, Sushmita ; Malaney, Robert ; Kanhere, Salil S. ; Seneviratne, Aruna ; Hu, Wen ; Janicke, Helge ; Jha, Sanjay K. Abstract Publication: IEEE Access Pub Date: 2020 DOI: 10.1109/ACCESS.2020.3010226 Bibcode: 2020IEEEA...8m4577A