Digital tools for COVID-19 contact tracing 4 June 2020 | COVID-19: Surveillance, case investigation and epidemiological protocols Download (183.1 kB) Contact tracing in the context of COVID-19 WHO Team WHO Headquarters (HQ) Editors World Health Organization Reference numbers WHO Reference Number: WHO/2019-nCoV/Contact_Tracing/Tools_Annex/2020.1 Copyright