Received October 28, 2020, accepted November 3, 2020, date of publication November 9, 2020, date of current version December 30, 2020. Digital Object Identifier 10.1109/ACCESS.2020.3036718 COVID-19 Contact Tracing: Challenges and Future Directions MOHAMMAD JABED MORSHED CHOWDHURY 1, (Member, IEEE), MD SADEK FERDOUS 2,3, KAMANASHIS BISWAS 4,6, (Member, IEEE), NIAZ CHOWDHURY 5, AND VALLIPURAM MUTHUKKUMARASAMY 6, (Member, IEEE) 1Department of Computer Science and Information Technology, La Trobe University, Melbourne, VIC 3086, Australia 2Department of Computer Science and Engineering, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh 3Centre for Global Finance and Technology, Imperial College London, London SW7 2AZ, U.K. 4Peter Faber Business School, Australian Catholic University, North Sydney, NSW 2060, Australia 5Knowledge Media Institute, The Open University, Milton Keynes MK7 6AA, U.K. 6School of Information and Communication Technology, Griffith University, Gold Coast, QLD 4215, Australia Corresponding author: Mohammad Jabed Morshed Chowdhury (
[email protected]) ABSTRACT Contact tracing has become a vital tool for public health officials to effectively combat the spread of new diseases, such as the novel coronavirus disease COVID-19. Contact tracing is not new to epidemiologist rather, it used manual or semi-manual approaches that are incredibly time-consuming, costly and inefficient. It mostly relies on human memory while scalability is a significant challenge in tackling pandemics. The unprecedented health and socio-economic impacts led researchers and practitioners around the world to search for technology-based approaches for providing scalable and timely answers. Smartphones and associated digital technologies have the potential to provide a better approach due to their high level of penetration, coupled with mobility.