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The campus of the Swiss Federal Institute of Technology (EPFL) with on the left the Learning Center is pictured empty during the state of emergency of the coronavirus disease (COVID-19) outbreak, in Lausanne, Switzerland, Friday, April 24, 2020. Secure contact tracing could be a powerful tool to fight the spread of COVID-19. A unique, decentralized system developed as part of an international consortium, including EPFL and ETH Zurich, will soon be launched with the support of the Swiss Federal Office of Public Health. DP-3T proposes a secure, decentralized, privacy-preserving proximity tracing system based on the Bluetooth Low Energy standard. Its goal is to simplify and accelerate the process of identifying people who have been in contact with someone infected with the SARS-CoV-2 virus. (KEYSTONE/Laurent Gillieron)